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NECO Biology Questions and Answers For 2023/2024 (Theory and Objectives)

Biology NECO Questions 2023. I will be showing you the NECO Biology objective and theory questions and answers for free in this post. You will also understand how NECO Biology questions are set and how to answer them.

The National Examinations Council (NECO ) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January respectively.

Table of Contents

NECO Biology Question and Answers Essay and OBJ (Expo)

The 2023 NECO Biology expo will be posted here today 21st July during the NECO Biology examination. Keep checking and reloading this page for the answers.

NECO 2023 Biology Answers Loading.. .

OBJ Answers:

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21-30: EBBBEADBDD

31-40: EDACCCBCEA

41-50: EBBCACBAEC

51-60: DDABBDDDBE

NECO Biology Essay Answers:

The cell theory states that:

– All living organisms are made up of one or more cells.

– The cell is the basic unit of life.

– All cells arise from pre-existing cells.

– Robert Hooke, who discovered cells in 1665 and coined the term “cell”.

– Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

– Large, brightly colored petals that attract insects.

– Nectar-producing glands to feed the insects.

– A strong, sweet fragrance to attract the insects.

– A landing platform for the insects to rest on.

– Pollen that is sticky and easily attaches to the insects.

– Ginger: Rhizome

– Banana: Rhizome

– Sweet potato: Tuber

– The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread.

– The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread.

– The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream.

– The large intestine absorbs water and electrolytes from the remaining food waste, forming feces.

– The rectum stores feces until they can be eliminated through the anus.

Amoeba —> Hydra —> Tilapia —> Toad —> Snake.

(i) Small, lightweight seeds that can be easily carried by the wind.

(ii) Hairs or wings on the fruit that increase surface area and help to catch the wind.

(iii) A dry, papery fruit that splits open easily to release the seeds.

To determine if the shoot of a plant is positively phototropic.

=Apparatus:=

A potted plant, a light source, a ruler, a marker.

=Method/Procedure:=

(i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic.

(ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot.

(iii) Turn on the light source and leave it on for 24 hours.

(iv) After 24 hours, measure the distance between the tip of the shoot and the light source.

(v) Mark the new position of the shoot tip on the ruler.

(vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:=

The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:=

The shoot of a plant is positively phototropic and grows towards a light source.

=Aerobic Respiration=

(i) Occurs in the presence of oxygen

(ii) Produces a large amount of ATP

(iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration=

(i) Occurs in the absence of oxygen

(ii) Produces a small amount of ATP

(iii) Lactic acid or ethanol is produced as a waste product.

=Complete Metamorphosis=

(i) Four distinct stages: egg, larva, pupa, adult.

(ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis=

(i) Three stages: egg, nymph, adult.

(ii) Nymph looks similar to the adult, just smaller.

– Aim: To determine if chlorophyll is necessary for photosynthesis to take place.

– Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.

– Method/procedure: Place one plant in a dark room and cover its leaves with aluminum foil. Place the other plant in front of a light source. After a few hours, pluck a leaf from each plant and place them in separate test tubes filled with water. Place the test tubes in a beaker and keep them in the dark.

– Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.

– Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(i) Overuse of synthetic fertilizers

(ii) Overgrazing

(iii) Deforestation

(iv) Soil erosion

(i) Hearing loss

(ii) Sleep disturbance.

(i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases.

(ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion.

(iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(i) Reduced leaves or spines to minimize water loss through transpiration.

(ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis.

(iii) Deep roots to tap into underground water sources.

(iv) CAM photosynthesis to reduce water loss during photosynthesis.

(v) Ability to enter dormancy during drought periods.

(i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis.

(ii) Presence of scales on bird feet and legs, which are also found in reptiles.

(iii) Similarity in egg-laying and incubation between birds and reptiles.

(i) Detoxification of harmful substances in the blood.

(ii) Production of bile to aid in digestion.

(iii) Storage of glycogen, vitamins, and minerals.

(iv) Regulation of blood glucose levels.

(v) Production of blood clotting factors.

(i) Reforestation: Planting new trees in areas where forests have been cleared or degraded.

(ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem.

(iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation.

(iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

(i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization.

(ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(i) Insulin: regulates blood sugar levels.

(ii) Estrogen: regulates female reproductive system and secondary sexual characteristics.

(iii) Testosterone: regulates male reproductive system and secondary sexual characteristics.

(iv) Adrenaline: prepares the body for “fight or flight” response to stress.

(v) Melatonin: regulates sleep-wake cycles.

(i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells.

(ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(i) Large surface area: to maximize light absorption.

(ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf.

(iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

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NECO Biology Questions and Answers For Practice

NECO Igbo Language Answers
NECO Yoruba Language Answers
NECO Hausa Language Answers

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The questions below are the NECO past questions and answers that will help you in your 2023 NECO Biology Questions.

1. Plants are classified into the following classes except

(a)Bryophyte.

(b) Coelenterate.

(d) thallophyta.

(e) Spermatophyte.

2. The cell wall of plants is rigid due to the presence of?

(a) Cambium

(b) cellulose

(d) chloroplast

3. The structure responsible for the transportation of mineral salt from the root to other parts of the plant is?

(a)Collenchyma

(d) sclerenchyma

4. Which of the following cell organelles traps sunlight energy in plant?

(a)Chloroplast

(b) Endoplasmic reticulum

(d) Ribosome (e) Vacuole

5. The following conditions are necessary for photosynthesis except

(a) Carbon(iv)oxide.

(b) chlorophyll

6. Which of the following organisms carries out photosynthesis?

(d) plasmodium

7. Which of these is an amphibian?

8. A flower with two or more fused carpels is called

(a) Apocarpous

(b) monocarpous

(d) pistillate

(e) syncarpous

9. The response of plants to the stimulus of touch is called?

(a) Chemotropism

(b) geotropism

(d) phototropism

(e) thigmotropism

10. Which of the following is a bryophyte?

(a) Bladder wort

(b) Fly trap

(d) Pitcher

11. Cellular respiration occurs in the

(a) Chloroplast

(b) endoplasmic reticulum

(d) mitochondrion

(e) nucleus

12. In a moss plant, spores are produced in the

(a) Capsule

13. Exoskeleton is a characteristic feature of

(b) earthworm

(d) millipede

(e) tapeworm

14. Which of the following influences growth in plants?

(a) Acetic acid

(d) Ethylene

15. Land snail belongs to the phylum

(a) Annelida

(b) Arthropoda

(d) Mollusca

(e) nematode

16. The opening of the anthers and stigmas of a bisexual flower at the same time is called

(a) Cleistogamy

(b) dichogamy

(d) protandry

(e) protogyny

17. The following are the effect of auxins on plant except in

(a) Flowering

(b) fruiting without fertilization

(d) root formation

(e) stem elongation

Use the diagram below to answer questions 18 and 19.

18. The diagram represents the internal structure of a

19. The part labeled I is the

(b) endodermis

20. Which of these is a water soluble vitamin?

(a) A

21. The following diseases are airborne except

(a) Clolera

(b) measles

(d) pneumonia

(e) small pox.

22. The excretory organ of insects is called

(a) Contractile vacuole

(b) flame cell

(d) malphighian tubule

(e) nephridium

23. Which of these animals undergo metamorphosis

24. Villi are finger-like structures found in the

(a) Large intestine

(d) stomach

(e) tongue.

25. In mammals, sperms are formed in the

(a) Cowper’s gland

(b) scrotal sac.

(d) seminiferous tubules

(e) vas deferens

26. Which of the following is not a part of the mammalian brain?

(a) Cerebellum

(b) cerebrum

(d) spinal cord

(e) Thalamus

27. In plant, Chlorosis is caused by the deficiency of

(b) magnesium

(d) potassium

(e) Sulphur

28. Which of the following diseases is not sexually transmitted

(b) Hepatitis

(d) influenza

(e) Syphilis

29. Which of the following is not a caste in a termitarium.

(d) soldiers

(e) workers

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30. The structure responsible for excretion in tape worm is called

(a) Cell membrane

(b) contractile vacuole

(d) malphigian tubule

31. The mode of nutrition of mushroom is

(a) autotrophic

(b) epiphytic

(d) saprophytic

(e) symbiotic

32. The earthworm is an example of

(b) Coelenterata

(d) nematoda

(e) Platyhelminthes

33. Fat and oil are also known as

(b) fatty acids

(e) carbohydrates

34. Gaseous exchange in the lungs occurs at the

(a) Alveolus

(b)bronchus

(c)bronchiole

(e) trachea

35. The following are pigment except

(d) haemoglobin

(e) melanin

Use the diagram below to answer questions 36 – 38.

36. The type of placentation shown above is found in

(a) cana lily

(d) pride of Barbados

(e) sunflower

37. the part labeled x is the

38. the type of placentation represented in the diagram is

(d) marginal

(e) parietal

39. the growth that occurs at the tip of shoot and root is called

(a) allometric

(d) primary

(e) secondary

40. carnassial teeth are found in

41. Which of the following bones is not a part of axial skeleton?

(a) Backbone

(e) Sternum

Use the diagram below to answer questions 42 and 43

42. The part labeled ii is the

(b) hyaline cartilage

(d) synovial cavity

(e) synovial membrane

43. The function of the part labeled iii is to

(a) Soften the bones

(b) join bones together

(d) protect bones from wearing

(e) reduce friction at joints

44. The part that supplies food and oxygen to the eye is

(a) Choroids

45. The part of the male reproductive system that stores sperm is

(b) epididymis

(d) seminal vesicle

(e) vas deferens.

46. An organ in bird that grinds its food is

47. Which of the following animals exhibit basking

48. The following are functions of the sympathetic nervous system except

(a) Dilation of pupil of eye.

(b) inhibition of saliva secretion

(d) reduction of urine output

(e) stimulation of ejaculation

49. The following homeostatic mechanisms are carried out by mammals except

(a) Excretion

(b) osmoregulation

(d) reproduction

(e) thermoregulation

50. Part of the brain that controls blood pressure is called

(d) medulla oblongata

(e) pons varolii

51. Haemorrhage is caused due to the deficiency of vitamin

52. The control method of pests using predators is called

(a) Biological

(b) chemical

(d) mechanical

(e) physical

53. The following are vectors except

(a) Black fly

(b) butterfly

(d) mosquito

(e) tsetse fly

54. The deficiency of proteins in a developing child result in

(a) Beri beri

(b) kwashiorkor

(d) rickets

55. The theory of “use and disuse” of body parts was propounded by

(a) Carl Linneaus

(b) Charles Darwin

(d) Jean Lamarck

(e) Robert Hooke

56. The knowledge of heredity and variation are not required in

(a) Blood transfusion

(b) crime detection

(d) longevity

(e) marriage

57. Which of these is not a pollutant

(a) Carbon dioxide

(b) Lead oxide

(d) Nitrogen oxide

(e) sulphur dioxide

58. The topmost layer of a typical soil profile is

(b) coarse sand

59. Plants that survive in marine habitats are called

(a) Halophytes

(b) hydrophytes

(d) saprophytes

(e) xerophytes

60. The felling of trees in a forest is called

(a) Afforestation

(b) deforestation

(d) forest pruning

(e) re-afforestation

Answer any three questions only

1a. State one role each of the following in photosynthesis

(i) Sunlight

(ii) Chlorophyll

b. List five types of bones found in the forearm of man

c. Mention three functions of a worker caste in termitarium

d. Define ecosystem

e. Draw a well labelled diagram (8-10cm long) of the nephron

2a. Define the following

(ii) Implantation

(iii) Species

(iv) Saprophytes

b (i) State four functions of the mammalian skeleton

(ii) Mention two muscles that bring about movement of a forearm

(iii) Name three digestive enzymes found in the small intestine and state one function of each

3a. (i) Mention three diseases of the liver

(ii) In a tabular form, state five differences between plant and animal cells

b. Using annotated diagrams only, illustrate the carbon cycle.

c. (i) List two types of supporting tissues in plant

(ii) Give two characteristics of a reptile

4a. Define the following terms

(i) Diffusion

(ii) Osmosis

(iii) plasmolysis

b (i) State four effects of overcrowding

(ii) mention two ways of conserving wildlife.

(iii) Give two examples of social animals

c (i) Define metamorphosis

(ii) List two examples of insects that undergo incomplete metamorphosis

(iii) Give two examples of a berry fruit

5a. (i) Draw a well labelled diagram (8-10cm long) of the human alimentary canal

(ii) Complete the table below

b. T T and t t are monohybrid plants representing tallness and shortness respectively

By means of crossing, show the F1 generation
Using punnet square method, show the F2 generation
Give the phenotypic ratio of the F1 and F2 generations shown above

That’s all about NECO Biology Questions and Answers for 2022 (Theory and Objectives). If you have any questions, kindly drop your question in the comment box.

Last Updated on July 21, 2023 by Admin

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NECO Biology Questions And Answers 2023 | Essay And Objectives

This article reveals all you need to know NECO Biology Questions and Answers 2023 | Essay and Objectives. All NECO candidates for 2023 June/July SSCE should take every information contained in this post very serious.

I have specially prepared this article for the benefit of those who will be writing the 2023 June/July NECO examination. If you are sure that you would be sitting for this examination and biology is one of the subjects that you will be writing, pay close attention to all that you are going to see here.

There is good news for you!

Do wish to the complete NECO biology questions and answers before entering the examination venue/hall? If you have answered yes to this question, then you have to read this article to the end.

I have got EXPO for you on 2023 NECO Biology Questions and answers for Essay and Objectives. Do not leave this page if want to get detailed information about it.

Keep reading!

Download New NECO Timetable For Free Here

NECO Biology Answers 2023 (EXPO)

Neco biology questions and answers for 2023 (essay and objectives), neco biology objective question for 2023, neco biology objective answers for 2023, neco biology theory questions for 2023 (essay), neco biology theory answers for 2023, more neco biology objective questions, neco biology objective answers to practice questions, related links:, read instructions, read carefully, take note of compulsory questions, start with the simplest, 5. attempt all the question, 6. review your answers, top 5 reasons for poor performance in neco biology examination.

1-10: DDEDBAEACC

11-20: DEECCBBBAB

21-30: EEADEAEAEA

31-40: BCCBCCBADE

41-50: DCCBCBECDC

51-60: EABBCCBADE

(i) Setting up of national park and gardens to save wildlife in their natural environment.

(ii) Poaching i.e. uncontrolled and illegal killing of game should be prevented.

(iii) Avoiding the use of pesticides that may kill off many animals

(vi) Prohibiting deforestation and encouraging afforestation

Sexual reproduction involves the fusion of two gametes – male and female gametes during fertilization to form a zygote which develops into a new organism. It involves organisms of the same species.

Sexual reproduction is the fusion or joining of male and female gametes or nuclei from different individual to form a zygote which later develops into an embryo or organism.

(i) biceps (flexor)

(ii) Triceps (extensor)

– When one touches a hot object, the sensory receptor in the skin receives the stimulus

– An impulse is transmitted from the receptor to the spinal cord, via the dorsal root/sensory neurone

– The intermediate neurone in the spinal cord passes on the impulse to the motor neurone

– The motor neurone then sends the impulses to an effector organ (muscle) via the ventral root

– All the neurones are linked by synapses across which impulses are sent

– The muscle upon receiving the impulse contracts causing the hand to be withdrawn from the hot object

(Pick Any Three)

(i) It provides water for photosynthesis

(ii) To get rid of excess water in the plant

(iii) It helps plants to continually draw water from the soil into their stem and leaves.

(iv) Some evaporation of water uses latent energy from plants and therefore keeps the plant cool

(v) It helps in the transport of mineral salts from soil to leaves and growing points of the plant

(i) Growing of cover crops like grasses, sweet potato which covers the surface of the soil

(ii) Contour ploughing: ploughing along the contours of a slope to reduce the speed of runoff water.

(NUMBER TWO)

Metamorphosis: This is the name given to the change in form shown by insects and amphibians from the egg stage to the adult stage.

(Pick Any Four)

(i) It regulate sex drive (libido)

(ii) It helps in the production of sperm

(iii) It helps in the production of red blood cells

(iv) It is responsible for muscle mass and strength

(v) Cause an increase in bone mass

(vi) Responsible for fat distribution

(i) It deaminates excess amino acid to urea

(ii) It stores iron from broken down cells

(iii) It detoxified poisonous substances and sent to the kidney for excretions

(iv) It supplies heat to the body by its metabolic reactions

(v) It also store fats and releases it at controlled rates into the blood when the need arises

(vi) It stores and releases minerals (iron, copper and potassium and vitamins (A, D and B12)

(i) Oxygen (only in the day)

(ii) Carbon dioxide (only at night)

(iii) Water

(iv) Tannins

(v) Alkaloids

(vi) Resins

(vii) Latex

– The semi-circular canals in the inner ear are responsible for the maintenance of balance with respect to circular motion.

– There are three semi-circular canals and each is found in one of the geometrical planes (right angle to each other)

– During spinning, the gelatinous cupula in one of the semi-circular canals is set in motion.

– This stimulates the sensory hairs, and impulses are sent through the auditory nerves to the brain for proper body posture.

– When one stops spinning, the gelatinous cupula does not stop moving instantly but continues to move for some time

– This cause the continue feeling of the sensation of spinning

(i)Buccal respiration

(ii)Lung respiration

(iii)Skin respiration

TABULATE PLEASE

=WIND POLLINATED FLOWERS=

(i) The flowers are not attractive

(ii) The pollen grains are not sticky

=INSECT POLLINATED FLOWERS=

(i) The flowers are attractive

(ii) The pollen grains are sticky

(i)Parietal placentation.

(ii) Basal placentation.

Light rays from an external object is refracted by the cornea, aqueous humour, the lens and the vitreous humour. The lens act as the fine adjustment bringing the rays to a focus on the retina. The image formed on the retina of human are inverted and diminished. The brain receives the stimulus via the optic nerves and then interprete it.

(i)Parasitic nutrition

(ii)Symbiosis

(iii)Carnivorous nutrition

(i) Internal fertilization

(ii) External fertilization

– After fertilization, the zygote divides repeatedly and develops into an embryo which consists of the plumule, radicle and one or two cotyledons.

– The primary endosperm nucleus develops into a nutritive tissue called endosperm, which stores food used by the developing embryo

– The synergids and the antipodal cells degenerate

– The ovule changes to form the seed and the interguments form the seed coat

– The micropyle remains where air and water enter the seed.

– The ovary develop into the fruit and the ovary wall forms the fruit wall called the pericarp.

– The style shrivels off, the petals, sepals and the stamens wither and fall off

(i) Red blood cells

(ii) White blood cells

(iii) Blood plasma

(iv) Platelets

(i)They are proteinous in nature

(ii) They speed up the rate of chemical reaction

(iii) They are organic catalyst

(iv) They are specific in function

Mendel’s first law also known as the law of segregation of genes states that during gamete formation, two alleles at a gene locus segregate from each other and each gamete has an equal probability of containing either allele

In this section, I will start by showing you all the questions that you should expect in your NECO biology objective questions for 2023.

Candidates should note that all the questions given in this section are predictions that are likely going to be true about NECO 2023.

Instructions

Each question is followed by FIVE options lettered A to E.

Find out the correct option for each question and shade in pencil in your answer sheet the answer space which bears the same letter as the option you have chosen.

Give only ONE answer to each question. An example is given below.

Which of these organisms is unicellular?

D. Paramecium

E. Spirogyra

The correct answer is ‘paramecium’ which is letter D, and therefore answer D would be shaded.

(A) (B) (C) ( D ) (E)

Erase completely any answer you wish to change.

Do all your rough work on this paper.

1. Which of these organisms exhibit both plant and animal features?

2. Water vapour in the mesophyll layer reaches the atmosphere via the

A. guard cells.

B. lenticels.

C. micropyle.

D. mid rib.

3. Plants with succulent stems and root systems are leaves, sunken stomata and deep

A. epiphytes.

B. hydrophytes.

C. mesophytes.

D. pteridophytes.

E. xerophytes.

4. Which of the following classes of food is stored in the body as energy reserve?

A. Carbohydrates

B. Fats and oil

C. Mineral salts

D. Proteins

E. Vitamins

5. Which of these fruits sticks to the body of animals during dispersal?

B. Caryopsis

E. Schizocarp

See also: NECO Government Questions and Answers for 2023

6. Which of the following groups of organisms causes blackpod disease?

A. Bacteria

B. Bryophytes

C. Protozoans

7. The mouth parts of mosquito are adapted for

A. piercing and chewing.

B. cutting and sucking

C. biting and filtering.

D. biting and licking.

E. piercing and sucking.

8. In housefly, the pair of stump-like wings beneath the first pair of wings is called

A. elytron.

B. halteres

D. squamosa

9. Which of these is NOT an excretory product?

10. The change in colour of a chameleon is an adaptation for

A. feeding.

C. movement.

D. protection.

E. reproduction.

11. A flower made up of one carpel is referred to as

A. apocarpous.

B. monocarpous.

C. monogamous.

D. pericarpous.

E. syncarpous.

12. Which of these soil types plays the most important role in determining the healthy growth of a vegetation?

A. Clay soil

B. Laterite

C. Loamy soil

E. Sandy soil

13. During the inspiration process of breathing in man, which of the following events takes place?

A. Diaphragm becomes dome-shaped.

B. Intercostal muscles relax.

C. rib cage is lowered.

D. Sternum moves forward.

E. Volume of the thorax decreases.

14. Lungs and gills are used for respiration in

C. insects.

15. An association between two organisms where both members benefit is known as

A. commensalism.

B. Cretinism

C. mutualism

D. parasitism

E. saprophytism.

16. The anaerobic process of respiration occurs in the

A. cytoplasm

B. endoplasmic reticulum.

C. mitochondrion.

E. ribosomes.

17. Excessive thyroxine secretion causes

A. hyperactivity.

B. hypoactivity.

C. isoactivity.

D. metamorphosis.

E. sensitivity.

18. The male and female gametes of a flower are

A. stigma and anthers.

B. style and stigma.

C. pollen grains and ovules.

D. Ovary and anthers.

E. anthers and filaments.

19. Which of the following is absent in the mammalian male organ?

A. Epididymis

B. Sperm duct

20. Which of these best defines an association in which the host is harmed?

A. Commensalism

B. Mutualism

C. Parasitism

D. Saprophytism

E. Symbiosis

21. Volvox exists as a/an

22. Meiotic cell division results in the

A. growth of the cell.

B. production of chromosomes.

C. production of gametes.

D. production of two daughter cells.

E. repair of tissues.

Use the above diagram to answer questions 23 and 24.

23. The fruit is formed from the part labelled?

24. What is the function of the part labelled I?

A. Develops into fruit

B. Grows into the pollen tube

C. Holds the flower

D. Produces the pollen grains

E. Receives pollen grains

25. The attachment of the embryo to the wall of the uterus is called

A. conception.

B. oogenesis.

C. fertilization.

D. implantation.

E. placentation.

Use the diagram above to answer questions 26 and 27.

26. In which of the labelled parts does a developing embryo obtain its food.

27. The part labelled II in the diagram is called.

A. albumen.

28. Which of the following animals exhibits territoriality?

29. The study of living organisms in relation to their environment is called

A. cytology.

B. ecology.

C. haemotology.

D. mycology.

E. paleontology.

30. Which of the following is the correct sequence of a food chain?

A. Grass →Grasshopper →Toad →Snake →Hawk.

B. Grasshopper →Toad →Hawk →Grass →Snake.

C. Snake →Grass →Hawk →Grasshopper →Toad.

D. Hawk →Grass →Snake →Grasshopper →Toad.

E. Grass →Grasshopper →Toad →Hawk →Snake.

31. Which of these is a pathogen?

A. HIV virus

C. Small pox

32. A bone with large centrum, neural canal and long spine can be found around the

33. Which of these food sources is rich in carbohydrates?

B. Groundnuts

34. Which of these is a morphological variation?

A. Blood groups

B. Colour blindness

D. Tasting PTC

E. Tongue rolling

35. The condition in which light rays from near objects are brought to focus behind the retina is

B. hypermetropia.

C. presbyopia.

D. astigmatism.

E. accommodation.

36. The two digestive enzymes that work in an acid medium are

A. amylase and pepsin.

B. lipase and renin.

C. maltase and erepsin.

D. pepsin and renin.

E. trypsin and lipase.

Study the diagram above and use it to answer questions 37 and 38.

37. In the diagram above, the part labelled II is called

A. contractile vacuole.

B. cytoplasm

C. eyespot.

D. photoreceptor.

E. flagellum.

38. The function of the part labelled III in the diagram is to

A. absorb water from the surrounding.

B. control the activities of the cell.

C. manufacture food.

D. move the organism.

E. store waste products.

39. The part of the nervous system which controls voluntary actions is the

A. cerebellum.

B. cerebrum.

C. medulla oblongata.

D. spinal cord.

E. thalamus.

40. Which of these insects undergoes incomplete metamorphosis?

B. Butterfly

C. Cockroach

D. Housefly

E. Mosquito

41. Which of the following blood groups is a universal recipient?

42. A little food substance in a test tube plus millon’s reagent when heated, tests for the presence of

A. Fats and oil.

B. Simple sugars.

D. Mineral salts.

E. Protein.

43. A child produced from the mating between mother and son (as in goats) is an example of

A. asexual reproduction.

B. cross-breeding.

C. in breeding.

D. out breeding.

E. self-fertilization.

44. The hereditary material controlling a particular trait in organisms is called

A. centrosome.

B. chromatid.

C. chromosome.

E. lysosome.

45. Which of these causes competition in a habitat?

A. Abundance of food.

B. Drought and adverse weather

C. High photosynthetic activities

D. Increase in population

E. Moderate rainfall and temperature

46. Which of these methods is a modern way of food preservations?

C. Refrigeration

47. The association existing between tapeworm and man is

A. holozoic.

B. parasitic.

C. predatory.

D. saprophytic.

E. symbiotic.

48. Sex-linked traits are

A. carried by genes on sex chromosomes.

B. carried by genes on autosomes.

C. most often x-linked.

D. mostly transferred from mother to offspring.

E. often recessive in nature.

49. Which of the following defines a climax community?

A. A stable stage in the succession of organisms

B. A series of changes in the population of organisms

C. Highest attainable stage in species composition

D. A community that changes only when a habitat factor changes

E. The composition and size are the same over a long period of time

50. If a young couple is found to be carriers of baldhead trait, what is the probability that their first child would be baldheaded?

Use the diagram below to answer questions 51 and 52.

51. Which of the following indicates the direction of movement of sperm introduced into the female reproductive organ.

A. II →I →IV →V

B. III →II →I →IV

C. VI →V →III →II

D. VI→IV →III →II

E. VI →IV →II →I

52. Where does fertilization take place?

53. Infertility in females may be as a result of

A. hairs on the body

B. lack of ovulation.

C. menstrual cycle.

D. narrow pelvis.

E. small breasts.

54. In which of the following parts of plants can auxins be found in highest concentration?

B. Lenticel

E. Shoot apex

55. Which of these animals possesses an exoskeleton?

A. Earthworm.

D. Starfish.

E Tapeworm.

56. The central nervous system is made up of which of the following pairs?

A. Brain and spinal cord.

B. Brain and nerves

C. Spinal cord and Sympathetic nervous system

D. Parasympathetic and sympathetic nervous systems.

E. Brain and Cerebrum

57. Which of the following is an autotrophic mode of nutrition?

A. Holozoic

B. Parasitic

C. Photosynthesis

D. Saprophytic

E. Symbiotic

58. For an organism to survive changes in its environment, it must

A. absorb more water.

B. adapt to the new conditions.

C. find shelter.

D. obtain more food.

E. obtain more light.

59. Which of these cell organelles is associated with energy generation?

A. Chloroplast

B. Endoplasmic reticulum

C. Golgi apparatus

D. Mitochondrion

E. Ribosome

60. In hypogeal germination, the

A. cotyledons are beneath the ground.

B. cotyledons are above the ground.

C. Epicotyl is beneath the ground.

D. Hypocotyl is above the ground.

E. Hypocotyl and cotyledons are above the ground.

The following are the answers to the objective question given in the previous section:

More of the answers to the objective question shall posted shortly. Keep checking this site for timely updates.

How to Answer NECO Biology Questions

This section the article is for everyone and especially for all those candidates who are desperate to knowing the right thing to do in order to achieve excellent performance in NECO Biology examination.

The following are the special tips on how to answer NECO biology questions:

Once you have settled to take your examination in the examination hall, the next thing that you must do first is to read through the instructions on top of the page before you can proceed with reading the questions.

Most times, some instructions are specific to some questions, maybe one or two questions. Here, you still have to take those instructions very serious.

Before you can proceed to answering NECO biology questions, it is highly recommended that you read carefully to understand any question before you can start to answer the questions.

It is possible to see questions that would be similar to what you have been seeing before, probably in past questions, but they are not the same.

This is the point where it is very necessary that you meticulously go through the question before you answer, to avoid choosing the wrong option for objectives and giving wrong explanations for theory questions.

In every NECO examination, there is/are usually some questions that are specially made compulsory by the Nation Examination Council. These questions are always seen in the paper 2 which is theory aspect of it.

You must ensure that you are able to answer those compulsory questions before you can think of answering any other ones. The compulsory questions do carry special mark.

Just like any other examinations, the complexity of every question in NECO government examination varies. After you have gone through the questions, you would be able to tell which of the questions are simple and the ones that are difficult.

The best approach in such case requires that you answer the questions from the simplest to the most complex ones. This is important because it will help to cushion you against examination tension.

Not only that, it also helps in the management of your time. If you are finding any question difficult to answer, you have to leave it and go to the next. Thereafter, you can re-visit those questions that you have left unanswered.

Though it is advisable that you start answering your question from the simplest, leaving the more difficult ones at the first attempts, it does not imply that you should submit you examination without answering those ones you skipped.

It quite understandable that you may not know all the asked questions, you are still required choose your answers even the ones that you do not really know very well.

Sometime, your guess can fall in place and become the right answer. So always ensure that you attempt all you question before you submit.

After you have attempted the entire given questions, you still have to go through all the answers to check for any errors and possible corrections.

By going through the questions, you would be able to see any skipped question(s), if any and the ones you mistakenly clicked the wrong options.

Get more tips: How to Pass your NECO Examination at One Sitting

It is an error to assume that NECO biology examination is hard. Failure to perform excellently in NECO biology examination is a question of whether the candidate knows the right things to do and if he/she is doing it right.

The poor performance that have been seen in some candidates’ results over the years are as a result of poor application of the basic principles for writing NECO biology examination and some other factors that I am going to show you here.

Inadequate Preparation

This is the most important aspect of the reasons for poor performance in NECO biology that should be considered.

It is obtainable in all areas that when there is poor preparation for any examination they will be poor result. As a good student, you are required to prepare for the NECO biology examination to the point that you would be sure of scoring high.

Reading without Past Questions

During the preparation phase of NECO biology examination and any other subjects, it is very pertinent that candidates make use of past question papers with reference to their answers.

Failure to make use past questions and answers is one the reasons why many candidates are left in abeyance immediately they enter the examination halls for the biology examinations.

Due to the ignorance of the nature of the examination, they will not even know to answer and most time it will result to examination tension and probably fever for the students.

Poor Time Management

Time management is another important factor that can lead to poor performance in every examination. You should learn how to manage your time especially when you are in the examination hall.

The practice of time management starts from the period of the candidate’s preparation for the examination. Once you can answer your past questions comfortably with the limited time that will be provided, you will still manage your time very well on the examination date.

Lack of Adherence to Given Instructions

There are some students who are fond of ignoring instructions when come for examination. Jumping into answering of questions without reading the given instructions is very wrong. This contributes in a big way to poor performance in the examination.

If you want to have good performance in NECO Biology, you have to strictly pay close attention to any given instructions.

Submitting Incomplete Answers

When a candidate submits the examination without attempting all the questions, it will automatically affect his/her score. It is important you answer all the questions before your submission.

I hope that you have enjoyed the information contained in this article. For more assistance on NECO Biology Questions and Answers for 2023/2024 (Essay and Objectives), kindly make use of the comment section below this article.

Do not forget to share this article with your friends.

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Neco biology answers 2023 for obj-essay questions out.

2023 NECO Biology Answers Release – See Objective & Essay Questions Here.

The Neco biology answers 2022 for objective essay questions is put. The National Examination Council (NECO) Biology SSCE will be written on Tuesday 26th July 2022.

The Neco Biology exam will comprise of Papers III & II: Objective & Essay which will commence from 10•00 am to 12•30 pm.

We are posting out NECO Biology questions for candidates that will participate in the examination for practice purposes from Neco biology answers and past questions.

NECO Biology Answers 2022 SSCE.

PAPER-II [Essay] Answer any FOUR questions. Write your answers on the answer booklet provided.

1. (a) i. What is respiration? ii. In a tabular form, state four differences between gaseous exchange and aerobic respiration. (b) i. Explain the term residual air. ii. What is the importance of residual air to mammals? (c) State four characteristic features associated with respiratory structures. (d) i. What is oxygen debt? ii. Outline three activities that can result in oxygen debt.

ANS: a) b) (i) During breathing out/expiration/exhalation; not all the air is removed from the lungs; the air left inside the lungs during breathing out is residual air. (ii) a ir is left in the lungs so that the lungs do not collapse; air is always left inside the lungs so that more oxygen can be removed (diffuse) into the bloodstream. (c) (d) i. The build-up of lactic acid; during strenuous exercise is poisonous and makes the muscles ache; oxygen is needed to break down/get rid of the lactic acid; that is why athletes continue breathing heavily even after the exercise is over; the oxygen needed to get rid of the lactic acid is known as oxygen debt. ii. Running; boxing; swimming /any correct example of strenuous activities.

2. (a) (i) What is sexual reproduction? (ii) Name four organs in mammals that produce sex hormones. (iii) Name one sex hormone produced by each of the organs named in 2(a)(i). (b) In a tabular form outline three differences between reproductions in lizards and birds. (c) (i) How are identical twins forms in humans? (ii) State three characteristic features of identical twins.

3. (a) Define the term osmosis. (b) State two ways each in which osmosis is of importance to; (i) plants; (ii) animals. (c) A normal terrestrial plant was watered daily with a hypertonic solution for about seven (7) days. It was discovered that the plant was not doing well. Explain why. (d) (i)Explain briefly how marine organisms overcome the problem of high salinity in their environment? (ii) List four examples of organisms found in the benthic zone of marine habitat.

4. (a) (i) What is conservation? (ii) State six factors responsible for the decline of the abundance and variety of wildlife. (b) Outline six ways in which the government can improve the situation in 4(a) (ii) above. (c) (i) What is Eutrophication? (ii) State two causes of eutrophication.

5. (a) What is reproduction? (b) In a tabular form, state six differences between sexual reproduction and (c) asexual reproduction. (d) State three advantages of sexual reproduction. (e) (i) Describe the female reproductive structure of a flowering plant. (ii) List two factors necessary for the germination of seeds.

6. (a) (i) What is courtship behaviour? (ii) Outline five benefits derived from the exhibition of courtship behaviour. (b) Describe briefly courtship behavior in the Agama lizard. (c) Describe briefly the mammalian placenta.

7. (a) Explain briefly the role of the skin as a sensory organ. (b) Describe briefly the vegetation of Tropical Rain Forest. (c) List five animals that inhabit the Tropical Rain Forest.

Neco Biology Objective Questions 2022.

13. A plant has flowers whose anthers mature and fall off before the stigma is fully developed. What will this prevent? A cross-pollination B insect-pollination C self-pollination D wind-pollination E air pollination.

14. Under which set of conditions will the transpiration rate of a well-watered plant be fastest? A a cool, dry, windless day B a cool, rainy, windy day C a hot, dry, windy day D a hot, rainy, windy day E a dry, dry, rainy day.

15. Which bones form a joint at the shoulder? A humerus and scapula B humerus and ulna C radius and ulna D radius and scapula E femur and collar bone.

16. A motor neuron transmits impulses from A muscle to the spinal cord B receptor to muscle C receptor to the spinal cord D spinal cord to muscle.

17. Where are most nitrogen compounds excreted from humans? A kidneys B liver C rectum D skin E bladder.

18. The cell wall of a plant cell is removed using an enzyme. What would happen if this cell is then placed in distilled water? A It would take longer for the cell to become turgid B Proteins in the cytoplasm would leave through the cell membrane C The cell would become smaller as water passes out D The cell would burst as water moves into it.

Note: There is nothing like Neco Biology Expo online. Neco Ssce candidates are to desist from patronizing online fraudsters/vendors who say they can provide such services as they are not real.

Keep following, more questions and answers will be added soon.

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EXPO: NECO Biology Questions and Answers Now Available 2023/2024

NECO Biology Questions and Answers: This NECO 2023 Biology; Theory and Objective (OBJ) expo question and answer is free for all candidates writing this year exams. If you are among those writing 2023 NECO Examination, Feel free to expect free answer here.

About NECO Biology Questions and Answers

The National Examination Council ( NECO ) is a Nigerian Exams Body that has been in operation since 2000 and is recognized globally.

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Biology Friday, 21st July.

Biology (Objective & Essay) 10:00am – 12:30pm

NECO Biology OBJ/Theory Paper is Out

NECO 2023 BIOLOGY ANSWERS

==================================

Biology-Obj!

01-10: BBEDACCAEE

11-20: DDCEABDAEC

21-30: EBBBEADBDD

31-40: EDACCCBCEA

41-50: EBBCACBAEC

51-60: DDABBDDDBE

The cell theory states that:

– All living organisms are made up of one or more cells.

– The cell is the basic unit of life.

– All cells arise from pre-existing cells.

– Robert Hooke, who discovered cells in 1665 and coined the term “cell”.

– Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

– Large, brightly colored petals that attract insects.

– Nectar-producing glands to feed the insects.

– A strong, sweet fragrance to attract the insects.

– A landing platform for the insects to rest on.

– Pollen that is sticky and easily attaches to the insects.

– Ginger: Rhizome

– Banana: Rhizome

– Sweet potato: Tuber

– The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread.

– The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread.

– The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream.

– The large intestine absorbs water and electrolytes from the remaining food waste, forming feces.

– The rectum stores feces until they can be eliminated through the anus.

===================================

Amoeba —> Hydra —> Tilapia —> Toad —> Snake

(i) Small, lightweight seeds that can be easily carried by the wind.

(ii) Hairs or wings on the fruit that increase surface area and help to catch the wind.

(iii) A dry, papery fruit that splits open easily to release the seeds.

To determine if the shoot of a plant is positively phototropic.

=Apparatus:=

A potted plant, a light source, a ruler, a marker.

=Method/Procedure:=

(i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic.

(ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot.

(iii) Turn on the light source and leave it on for 24 hours.

(iv) After 24 hours, measure the distance between the tip of the shoot and the light source.

(v) Mark the new position of the shoot tip on the ruler.

(vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:=

The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:=

The shoot of a plant is positively phototropic and grows towards a light source.

=Aerobic Respiration=

(i) Occurs in the presence of oxygen

(ii) Produces a large amount of ATP

(iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration=

(i) Occurs in the absence of oxygen

(ii) Produces a small amount of ATP

(iii) Lactic acid or ethanol is produced as a waste product

(i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases.

(ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion.

(iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(i) Reduced leaves or spines to minimize water loss through transpiration.

(ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis.

(iii) Deep roots to tap into underground water sources.

(iv) CAM photosynthesis to reduce water loss during photosynthesis.

(v) Ability to enter dormancy during drought periods.

(i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis.

(ii) Presence of scales on bird feet and legs, which are also found in reptiles.

(iii) Similarity in egg-laying and incubation between birds and reptiles.

(i) Detoxification of harmful substances in the blood.

(ii) Production of bile to aid in digestion.

(iii) Storage of glycogen, vitamins, and minerals.

(iv) Regulation of blood glucose levels.

(v) Production of blood clotting factors.

(i) Reforestation: Planting new trees in areas where forests have been cleared or degraded.

(ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem.

(iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation.

(iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

Please for any inquiry on NECO Biology Questions and Answers use the comment box below as we will act swiftly.

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2023 neco biology answers.

BIOLOGY 01-10: BBEDAACADA 11-20: DDCEADDAEC 21-30: BBBBEDDBDD 31-40: EDACCCBCEA 41-50: EBBCACBABC 51-60: DDABEDDDBE

COMPLETED *NECO BIOLOGY*

*NUMBER 4 ????????????????????????*

*(4ai)* (PICK ANY THREE) (i) The crops with tap roots should be followed by those with fibrous root system. (ii) Selection of the crop should be demand based. (iii) The selection of crops should be problem based. (iv) The selection of crops should suit to the farmer’s financial conditions. (v) More exhaustive crops should be followed by less exhaustive crops. (vi) The crops selected should also suit to the soil and climate conditions. (vi) The crops selected should also suit to the soil and climate conditions.

*(4aii)* (PICK ANY FIVE) (i) The presence of thick, waxy cuticles on leaves: (ii) Stomata present in the upper epidermis only: (iii) Shrinking of hinge cells when flaccid: (iv) Flashy succulent leaves: (v) Have reduced number of stomata: (vi) Sunken stomata or presence of crypts and leaf surface covered with fine hairs. (vii) Closed stomata in the presence of light and opened stomata in the absence of light: (viii) Leaves are reduced to spines, needles, or scales and they are folded or rolled when flaccid

*(4bi)* (i) Feathers : Feathers are modified scales that provide insulation and enable flight in birds. Some fossil reptiles, such as Archaeopteryx and Microraptor, also had feathers, suggesting that they were an ancestral trait that evolved before the divergence of birds and reptiles. (ii) Bones : Birds have hollow bones that reduce their weight and enhance their flight ability. Some fossil reptiles, such as Coelophysis and Pterosaurs, also had hollow bones, indicating that they were an adaptation to a fast and agile lifestyle. (iii) Eggs : Birds lay hard-shelled eggs that protect their embryos from dehydration and predation. Reptiles also lay hard-shelled eggs, implying that they share a common reproductive strategy that originated in their ancient ancestors.

*(4bii)* (PICK ANY FIVE) (i) Regulates amino acids. ((ii) Regulates blood clothing (iii) Stores Vitamins and Minerals. (iv) Processes glucose (v) Filters blood (vi) Bile production (vii) Albumin production (viii) Resists infections.

*(4c)* (PICK ANY FOUR) (i) Reforestation. (ii) Afforestation (iii) Protect Existing Forests. (iv) Sustained Yield Method. (v) Produce Less Waste (vi) Monitor Agriculture (vii) Planned and Regulated Tree-cutting (viii) Laws and Rules Help Prevent Deforestation. *(5cii)* (PICK ANY THREE ) (i) Chloroplast contains a photosynthetic pigment called chlorophyll. (ii) The stomata are located on the backside of the leaves which helps regulate water loss from the leaves. (iii) Leaves have a thin structure so that they can provide a short distance for carbon dioxide to diffuse into leaf cells (iv) The veins of leaves help to transport maximum water molecules and water to all parts of the leaves. (v) The plant produces larger leaves, which means a larger surface area for maximum absorption of sunlight. *Biology* 2ai. Rearranging the organisms in order of increasing complexity:

Amoeba → Hydra → Tilapia → Toad → Snake

2aii. Three features of Tridax procumbens fruit that make it adapted for wind dispersal method are:

1. **Lightweight:** The fruit is small and lightweight, allowing it to be easily carried by the wind.

2. **Pappus:** Tridax procumbens fruit has a pappus, which is a structure resembling fine hairs or bristles that acts as a parachute, aiding in wind dispersal.

3. **Wings or Achenes:** The fruit may have wings or achenes that provide additional lift and stability during wind dispersal.

2b. Experiment to show shoot of a plant is positively phototropic:

**Aim:** To demonstrate the positive phototropic response of a plant shoot to light.

**Apparatus:** 1. Potted plant (e.g., sunflower seedling or bean plant). 2. Light source (lamp or sunlight). 3. Ruler or measuring tape. 4. Stopwatch or timer.

**Method / Procedure:** 1. Place the potted plant in a dark room or a box with an opening on one side, leaving the shoot exposed to darkness. 2. Mark the initial position of the shoot tip on the ruler or measuring tape. 3. Turn on the light source and position it on one side of the plant shoot, ensuring that the light shines directly on the shoot. 4. Start the stopwatch.

**Observation:** Observe and record the movement of the shoot tip over a specific period, such as every 30 minutes, for a few hours.

**Conclusion:** The shoot of the plant will exhibit positive phototropism, bending towards the light source. This shows that the plant shoot is positively phototropic and actively responds to the light stimulus by growing towards it. *Biology-Obj!* 01-10: BBEDACCAEE 11-20: DDCEABDAEC 21-30: EBBBEADBDD 31-40: EDACCCBCEA 41-50: EBBCACBAEC 51-60: DDABBDDDBE

*NECO BIOLOGY SOLUTIONS* ===================================

“`INSTRUCTION; ANSWER THREE(3) QUESTIONS ONLY“`

(1ai) The cell theory states that: (i) All living organisms are made up of one or more cells. (ii) The cell is the basic unit of life. (iii) All cells arise from pre-existing cells.

(1aii) (i) Robert Hooke, who discovered cells in 1665 and coined the term “cell”. (ii) Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

(1bi) (i) Large, brightly colored petals that attract insects. (ii) Nectar-producing glands to feed the insects. (iii) A strong, sweet fragrance to attract the insects. (iv) A landing platform for the insects to rest on. (v) Pollen that is sticky and easily attaches to the insects.

(1bii) – Ginger: Rhizome – Banana: Rhizome – Sweet potato: Tuber

(1c) (i) The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread. (ii) The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread. (iii) The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream. (iv) The large intestine absorbs water and electrolytes from the remaining food waste, forming feces. (v) The rectum stores feces until they can be eliminated through the anus. ===================================

(2ai) Amoeba —> Hydra —> Tilapia —> Toad —> Snake

(2aii) (i) Small, lightweight seeds that can be easily carried by the wind. (ii) Hairs or wings on the fruit that increase surface area and help to catch the wind. (iii) A dry, papery fruit that splits open easily to release the seeds.

(2b) =Aim:= To determine if the shoot of a plant is positively phototropic.

=Apparatus:= A potted plant, a light source, a ruler, a marker.

=Method/Procedure:= (i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic. (ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot. (iii) Turn on the light source and leave it on for 24 hours. (iv) After 24 hours, measure the distance between the tip of the shoot and the light source. (v) Mark the new position of the shoot tip on the ruler. (vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:= The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:= The shoot of a plant is positively phototropic and grows towards a light source.

(2c) [TABULATE]

=Aerobic Respiration= (i) Occurs in the presence of oxygen (ii) Produces a large amount of ATP (iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration= (i) Occurs in the absence of oxygen (ii) Produces a small amount of ATP (iii) Lactic acid or ethanol is produced as a waste product

===================================

(3ai) – Rivers – Lakes

(3aii) TABULATE

=Complete Metamorphosis= (i) Four distinct stages: egg, larva, pupa, adult. (ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis= (i) Three stages: egg, nymph, adult. (ii) Nymph looks similar to the adult, just smaller.

(3b) – Aim: To determine if chlorophyll is necessary for photosynthesis to take place.

– Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.

– Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.

– Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(3ci) (i) Overuse of synthetic fertilizers (ii) Overgrazing (iii) Deforestation (iv) Soil erosion

(3cii) (i) Hearing loss (ii) Sleep disturbance ===================================

(4ai) (i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases. (ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion. (iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(4aii) (i) Reduced leaves or spines to minimize water loss through transpiration. (ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis. (iii) Deep roots to tap into underground water sources. (iv) CAM photosynthesis to reduce water loss during photosynthesis. (v) Ability to enter dormancy during drought periods.

(4bi) (i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis. (ii) Presence of scales on bird feet and legs, which are also found in reptiles. (iii) Similarity in egg-laying and incubation between birds and reptiles.

(4bii) (i) Detoxification of harmful substances in the blood. (ii) Production of bile to aid in digestion. (iii) Storage of glycogen, vitamins, and minerals. (iv) Regulation of blood glucose levels. (v) Production of blood clotting factors.

(4c) (i) Reforestation: Planting new trees in areas where forests have been cleared or degraded. (ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem. (iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation. (iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

(5a) DIAGRAM

(5bi) (i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization. (ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(5bii) (i) Insulin: regulates blood sugar levels. (ii) Estrogen: regulates female reproductive system and secondary sexual characteristics. (iii) Testosterone: regulates male reproductive system and secondary sexual characteristics. (iv) Adrenaline: prepares the body for “fight or flight” response to stress. (v) Melatonin: regulates sleep-wake cycles.

(5ci) (i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells. (ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(5cii) (i) Large surface area: to maximize light absorption. (ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf. (iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

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2023 NECO BIOLOGY: (8459)

Obj & notice section, 2023 neco biology answers password/pin/code is 8459 . you can use it to view 2023 biology answers a day before the exam..

BIOLOGY - OBJ-

01-10: ECCECDBBBD

11-20: BCAEBECEEB

21-30: EECDCDDEBE

31-40: ADBECECCBA

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51-60: EADADACBBB

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============================

ESSAY-ANSWERS

INSTRUCTIONS:

ANSWER FOUR(3) QUESTIONS IN ALL.

(5ai)

Courtship behavior in Agama Lizard

(i) A sexually active male lizard is large, brightly coloured/with an orange/blue head

(ii) female lizard is smaller and less colourful/brown with green markings

(iii) dominant male lizard defends its territory

(iv) by driving away/fighting off/lashing other males with its tail

(v) male displays its full colours in front of female

(vi) female responds by arching her back and lifting her tail vertically

(vii) male tries to catch her

(viii) female usually runs away

(ix) when caught mating may take place.

Aestivation is the mode of arrangement of sepals or petals in the floral bud with respect to the other members of the same whorl.

(i)Nose for smelling

(ii)Eyes for seeing

(iii)Tongue for tasting

(iv)Ear for hearing

When a person spin around rapidly, that liquid in the inner ear spins as well. When the person stops spinning the liquid keeps moving for a bit, confusing your brain into thinking that the person is still spinning even when the person is standing still and that causes the feeling dizziness after spinning around the stationary object.

Neuron; transmit information to other nerve cells, muscle, or gland cells.

cerebrum; initiates and coordinates movement and regulates temperature

Mendulla Oblongata; passes messages between your spinal cord and brain.

cerebellum; coordinates voluntary movements

(i)tropic the effect is more or less permanent while Nastic movements are temporary and reversible.

(ii)Stimuli for the tropic movements are unidirectional and never diffuse while The stimuli for the Nastic movements may be unidirection or diffuse.

(iii)Movement in tropic movements is directional while Nastic movements is non directional

(i)Contains chlorophyll Absorbs light

(ii)Stomata Allows carbon dioxide to move by diffusion into the leaf

(iii)Guard cells To open and close the stomata depending on the conditions

(i) To search for food.

(ii) Escape predators.

(iii) Find mates for reproduction.

(iv) To disperse/reduce competition/overcrowding by moving to new locations.

Phloem: Responsible for the transportation of enzymes/hormones.

Leaf: is used for photosynthesis

Xylem; is to transport water from roots to stems and leave

Flower; is for reproduction in plant

(i)Low water requirements

(ii)No leaves or small number of leaves

(iii)Possession of thorn or needles

(i)it provides new cells for growth

(ii)for replacement of worn-out cells

An image is formed on the retina with light rays converging most at the cornea and upon entering and exiting the lens. Rays from the top and bottom of the object are traced and produce an inverted real image on the retina. The distance to the object is drawn smaller than scale.

(i)Evidences from Palaeontology

(ii)Evidences from Comparative Morphology

(iii)Evidences from taxonomy

-[Pick any two]-

(ii) eyelashes

(iii) eyelids

(iv) conjunctiva

(v) lacrimal glands

(i) Excretion is a process in which metabolic waste is eliminated from an organism.

(ii) Competition is an interaction between organisms or species in which both the organisms or species are harmed.

(iii) Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural croplands, urbanization, or mining activities.

Competition is defined as the process by which living organisms in a habitat struggle or compete with one another for such limited essential needs in the environment. e.g. food, light, nutrients etc.

(2biii)

Deforestation is the continuous removal of forest stands (trees) either by bush burning or indiscriminate felling without replacing them

2023 NECO BIOLOGY: (8459) Welcome to official 2023 Biology NECO answer page. We provide 2023 Biology NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Bio Expo

(i) Freezing

(ii) Boiling

(iii) Dehydration.

(iv) Canning.

(v) Salting

(vi) Sweetening

==========================

(i) Meiosis : four daughter cells

(ii) Mitosis: two identical daughter cells

(i)It reduces the risk of diseases from parents to offsprings

(ii)It create diversity and variation among populations

The relationship is known as commensalism in which the remora fish gains while he shark neither gain nor loose. In this case, the remora fish attach itself to the shark which transport it round the water protecting it form predators and it also obtain it's food through the process. The shark on the other hand neither gain or loose.

(i)High fever

(ii)Sore throat

(iii)dry cough

It carries filtered blood from the kidney's to the posterior vena cava

Ecological niche: This is the exact position by an organism in a particular habitat

Population density: This can be defined as the total number of organism per unit area of the habitat

Climax community: This is established when a stable or unchanging community is attained, thus the community is in equilibrium with the environment

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NECO 2022 Biology Obj & Essay Questions And Answer Now Available

July 25, 2022 Wakagist Neco 0

BIOLOGY-THEORY-ANSWERS

NOTE; You Are To Answer Only Three(3) Questions From Theory Pls Take Note; Because We Answered All. ==============================

(1ai) (i) Setting up of national park and gardens to save wildlife in their natural environment. (ii) Poaching i.e. uncontrolled and illegal killing of game should be prevented. (iii) Avoiding the use of pesticides that may kill off many animals (vi) Prohibiting deforestation and encouraging afforestation

(1aii) Sexual reproduction involves the fusion of two gametes male and female gametes during fertilization to form a zygote which develops into a new organism. It involves organisms of the same species.

(1aiii) (i) biceps (flexor) (ii) Triceps (extensor)

(1b) (i) When one touches a hot object, the sensory receptor in the skin receives the stimulus (ii) An impulse is transmitted from the receptor to the spinal cord, via the dorsal root/sensory neurone (iii) The intermediate neurone in the spinal cord passes on the impulse to the motor neurone (iv) The motor neurone then sends the impulses to an effector organ (muscle) via the ventral root (v) All the neurones are linked by synapses across which impulses are sent (vi) The muscle upon receiving the impulse contracts causing the hand to be withdrawn from the hot object

(1ci) (i) It provides water for photosynthesis (ii) To get rid of excess water in the plant (iii) It helps plants to continually draw water from the soil into their stem and leaves.

(1cii) (i) Growing of cover crops like grasses, sweet potato which covers the surface of the soil (ii) Contour ploughing: ploughing along the contours of a slope to reduce the speed of runoff water. ==============================

(2ai) Metamorphosis can be defined as the change of form or structure in an organism after hatching or birth.

(2aii) (i) Promotion of sperm production (ii) Aids development of uterine wall (iii) Stimulates growth of testis (iv) Promote development of secondary sexual characters in male

(2aiii) (i) Production of bile (ii) Detoxification (iii) Deamination (iv) Source of vitamin

(2bi) (i)Oxygen (ii)Acids (iii)Tannins

(2bii) When a man spins around a tree several time, there is an increase in metabolism leading to use up of energy. This as a result leads to decrease in energy and in turn causes dizziness ==============================

(3ai) (i)Buccal respiration (ii)Lung respiration (iii)Skin respiration

(3aii) TABULATE PLEASE

=WIND POLLINATED FLOWERS= (i) The flowers are not attractive (ii) The pollen grains are not sticky

=INSECT POLLINATED FLOWERS= (i) The flowers are attractive (ii) The pollen grains are sticky

(3aiii) (i)Parietal placentation. (ii) Basal placentation.

(3bi) Light rays from an external object is refracted by the cornea, aqueous humour, the lens and the vitreous humour. The lens act as the fine adjustment bringing the rays to a focus on the retina. The image formed on the retina of human are inverted and diminished. The brain receives the stimulus via the optic nerves and then interprete it.

(3bii) (i)Parasitic nutrition (ii)Symbiosis (iii)Carnivorous nutrition ==============================

(4ai) [img]https://i.imgur.com/paojzlh.jpeg[/img]

(4aii) (i)Internal fertilization (ii)External fertilization

(4bi) Fruits is a product of fertilization in flowering plants. When a grain of pollen tube for the sperm to journey down the style and fertilize the ovule. The fertilized ovules become seeds. Fertilization is the death of the flower, as the petals drop or wither at this point and the ovary starts to enlarge and ripen into what we known as fruit

(4bii) (i)plasma (ii)red blood cells (iii)white blood cells (iv)platelets ==============================

(5ai) (i)They are proteinous in nature (ii) They speed up the rate of chemical reaction (iii) They are organic catalyst (iv) They are specific in function

(5aii) Mendel’s first law also known as the law of segregation of genes states that during gamete formation, two alleles at a gene locus segregate from each other and each gamete has an equal probability of containing either allele

(5aiii) [img]https://i.imgur.com/WH7MrFs.jpeg[/img]

(5bi) (i)Bush burning (ii)Overcropping (iii)Overgrazing

(5bii) (i)Seasonal migration (ii)Pairing (iii)Territoriality ==============================

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2022/2023 NECO Biology Questions and Answers For all Candidates

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2023 NECO Biology Question and Answers

The questions below are not exactly 2023 NECO Biology questions and answers but likely NECO Biology repeated questions and answers.

These questions are strictly for practice. The 2023 NECO Biology expo will be posted on this page on the day of the NECO Biology examination. Keep checking and reloading this page for the answers.

BIOLOGY PAPER II Paper 1 will last for 1 hour Attempt all questions from this section Answer Paper 1 on your objective test answer sheet, Use HB pencil throughout.

1. Which of the following organisms carries out photosynthesis?

(d) plasmodium

2. Which of the following cell organelles traps sunlight energy in plants?

(a)Chloroplast

(b) Endoplasmic reticulum

(d) Ribosome

(e) Vacuole

3. The following conditions are necessary for photosynthesis except

(a) Carbon(iv)oxide.

(b) chlorophyll

4. The tissue which connects a muscle to a bone is a known as____?

(a) cartiligae

(b) muscle fibre

(d) ligament

(e) connecting fibre

5. A fruit formed from a single flower having several free carpels is called___?

(a) multiple fruits

(b) dry dehiscent fruit

(d) aggregate fruit

9. If the anthers of a flower mature before the stigma, the condition is termed?

(a) epigyne

(b) hypogyny

(d) protandry

(e) perigyny

10. An instrument used in measuring the speed of wind is called__?

(a) barometer

(b)wind gauge

(d) an anemometer

(e) a hydrometer

11. Spirogyra reproduces vegetatively by?

(a) spore production

(b) fragmentation

(d) budding

(e) binary fission

12. Which of the following instruments is used to demonstrate the response of roots and shoots to gravity?

(a) Klinostat

(b) Manometer

(d) Potometer

(e) Photometer

13. Milk protein is hydrolyzed by____?

(b) amylase

(d) lactase

14. The rate of transpiration of a leafy shoot would be highest under?

(a) damp, cold, still air

(b) damp, warm, moving air

(d) dry, cold, moving air

(e) dry, warm, still air

15. What is the name of the respiratory organ of the crab?

(a) Tubules

(b) Trachea

16. The two types of human tapeworm can be distinguished by the presence or absence of?

(e) proglottis

17. Which of this is not a digestive enzymes?

(e) ptyalin

18. In a bakery, yeast is added to flour to make bread rise. This is possible because yeast produces?

(a) alcohol

(e) ethanol

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BIOLOGY PAPER III Paper 3 will last for 1 hour

(2aii) The muscle that contracts to cause the joint to straighten is called extension. When one muscle is contracted, the other muscle from the other pair is always elongated. The biceps and triceps muscles work together to allow bending and straightening of the arm.

(2bi) (i) Baking of bread. (ii) Formation of acid. (iii) Formation of diary product.

(2bii) (i) Production of honey eg bees (ii) Pollinating crop we use for food. (iii) Some are scavengers and prevent decay. (iv) Production of silk. (v) Human food is spiked by cockroaches, ants and flies.

(2biii) (i) Both has Ribosome. (ii) Both has hybosomes. (iii) Both has Nucleolus. (iv) Both has Mitochondria and Golgi bodies.

4b) TABULATE Living thing: -They can move -They reproduce -They grow -They respond to stimulus -They excrete Non living: -Most do not move -They do not reproduce -They do not grow -They do not respond to stimulus -They do not excrete

4c) -Large cylindrical centrum -Large neural canal -Short tranverse process -Long neural spine

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10 Comments

Please which year past questions is this

The question you saw here is compulsory questions that you are to expect on your exam day.

Does that means these are the questions we are to answer for 2022 Neco exam?

Is this the passed question or 2021 question

wphich year question paper is this

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How many questions are to be answered in paper III

Pls give us this year update

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