Neco Biology Questions And Answers 2023

Neco Biology Questions And Answers 2023.

Welcome to zamfara blog, where we have provided you complete neco biology questions and answers 2023.



1. The organelle that controls the activities of a cell is
A. cellulose
B. ectoplasm.
C. endoplasm
D. nucleus
E. ribosome.

2. The organelle for movement in Amoeba is
A. cilium.
B. fin.
C. flagellum
D. pseudopodium.

3. The vector of trypanosoma is
A. black fly.
B. borse fly
C. housefly.
D.sand fly
E. tsetsefly.

4. The response of plants to light stimulus is called
A. chemotropism.
B. geotropism
E. thigmotropism.

5. Rays of light enter human eye through the
A. cornea.
B. iris.
C. lens.
D. pupil.
E. retina.

6. Deficiency of insulin in humans causes
A. diabetes.
B. goitre.
C. kwashiorkor.
D. rickets.
E. scurvy.

7. Water is transported from roots to leaves of plants through the
A. cambium.
B. cortex.
C. pericycle.
D. phloem.
E. xylem.

8. The vitamin for good vision is
A. A.
B. C.
C. D.
D. E.
E. K.

9. Which of the following organs in mammals is respiratory in function?
A. Kidney
B. Liver
C. Lungs
D. Pancreas
E. Skin

10. The following are conditions necessary for photosynthesis except
A. carbon dioxide.
B. chlorophyll.
C. oxygen.
D. sunlight.
E. water.

11. Spermatozoa are produced in the
A. epididymis.
C. scrotum.
D. testis.
E. vas deferens.

12. Development of fruits without fertilization is termed
A budding.
B. cutting.
C. grafting.
D. hermaphroditism.
E. parthenocarpy.

13.The external part of the human ear is
A. anvil.
C. eardrum.
D. hammer.
E. pinna.

14. Brain and spinal cord make up the system.
A. endocrine
B. excretory
C. nervous
D. reproductive
E. respiratory

15. Asexual method of reproduction in spirogyra is by
A. budding.
B. conjugation.
C. fragmentation.
D. multiple fission.
E. sporulation

16. The organ that removes the largest amount of water from human body is
B. kidney.
D. lung.

17. Mitochondrion is used for
A. cell division.
B. production of energy.
C. protein synthesis.
D. removal of waste materials.
E. transfer of heredity materials.

18. Lack of iodine in man causes
A. beriberi.
B. goitre.
C. kwashiorkor.
D. rickets.
E. scurvy.

19. Which of thefollowing structures is not involved in respiration?
A. Alveoli
B. Bronchi
C. Nostrils
E. Villi

20. Bacteria infection is treated with
A. antibiotics.
B. antibodies.
C. antigens.
D. antiseptics.

21. Inhaled air is made warm and moist in the
A. alveoli.
B. epiglottis.
C. mouth.
D. nose.
E. trachea.

22. Example of an element required in small amount by plants is
A. calcium.
B. hydrogen.
C. phosphorus.
D. potassium.
E. zinc.l

23. Nodding and rotatory movement of the head is made possible by
A. Atlas and axis.
B. radius and ulner.
C. tibia and fibula.
D. scapula and carvicle.
E. tarsals and metatasals.

24. Leguminous plants are important because they
A.improve aeration of the soil.
B. improve soil texture.
C .improve water holding capacity of the soil.
D increase rate of soil formation.
E. promote nitrogen fixation.

25. The enzyme secreted in the duodenum during carbohydrates digestion is
A. amylase.
B. pepsin.
C. ptyalin.
D. rennin.
E. trypsin.

26 The process by. which a young herbaceous plant is kept upright is known as
A. guttation.
B. osmosis.
C. plasmolysis.
D. translocation.
E. turgidity.

27.The haploid number of chromosomes in human is
A. 23.
B. 24.
C. 25.
D. 46.
E. 48.

28. Organisms that feed on plants are referred to as
A. carnivores.
B. herbivores.
C. omnivores.
D. parasites.
E. saprophytes.

29. Which of the following food substances would produce a translucent mark when crushed on a white paper?
A. Banana
B. Cowpea
C. Groundnut
D. Mango
E. Potato

30. The following life processes are common to both plants and animals except
A. growth.
B. nutrition.
C. photosynthesis.
D. reproduction.
E. respiration.

31. The part of ear responsible for equalizing air pressure on both sides of the eardrum is
A. cochlea.
B. eustachian tube.
C. pinna.
D. semi circular canals.
E. tympanum.

32.Kreb’s cycle occurs in the
A. endoplasmic reticulum.
B. golgi body.
C. mitochondrion.
D. nucleus.
E. ribosome.

33. The transmission of characters from parent to offspring is terned
A. cloning.
B. evolution.
C. heredity.
D. resemblance.
E. variation.

34. A food substance which produces red colouration when mixed with sudan III solution contains
A. cellulose.
B. fat.
C. glucose.
D. protein.
E. starch.

35. The reagent used in testing for glucose is called
A. Benedict’s solution
B. Copper sulphate
C. Iodine solution
D. Osmic acid
E. Potassium permanganate

36. A hereditary disease that can be prevented through marrrage counselling is
B. malaria.
C. poliomyelitis.
D. sickle cell.
E. sleeping sickness.

37. .The deficiency of vitamin C in human causes
A. beri beri.
B. goitre.
C. kwashiorkor.
D. pellagra.
E. scurvy.

38. The part of brain involved in constriction and dilation of blood vessels is
A. cerebellum.
B. cerebrum.
C. hypothalamus.
D. medulla oblongata.
E. thalamus.

39. Fishes are cold-blooded because their body temperature is
A. always low.
B. constantly high.
C. dependent on their environment.
D. fairly constant.
E. regulated at will.

40.  The following are the major biomes of the world except
A. afro-alpine.
B. desert.
C. estuary.
D. savannah.
E. tropical forest.

41.The hormone which regulates the amount of glucose in the blood is
A. adrenalin.
B. insulin.
C. oxytocin.
D. progesterone.
E. thyroxine.

42. Deamination occurs in the
A. intestine.
B. kidney.
C. liver.
D. pancreas.
E. spleen.

43 .Hereditary characters in plants and animals are carried on the
A. centrosome.
B. genes.
C. mitochondria.
D. pyrenoids.
E. ribosomes.

44. The mouth part of butterfly is modified for

A. absorbing.

B. biting.
C. chewing.
D. stinging.
E. sucking

45. The ability of the eye to alter its focal length in order to form an image on the retina is called
A. accommodation.
B. astigmatism.
C. binocular vision.
D. colour vision.
E. image formation.

46. The failure of species to adapt to any environment could lead to
A. competition.
B. extinction.
C. growth.
D. incubation.
E. starvation.

47. The theory of ‘use and disuse of organs’was propounded by
A. Charles Darwin.
B. Jean Lamarck.
C. Robert Hooke.
D. Theodor Schwann.
E. Thomas Malthus.

48 .Respiration in the absence of oxygen is described as
A. aerobic.
B. anabolic.
C. anaerobic.
D. catabolic.
E. metabolic.

49.  An example of a macro element is
A. carbon.
B. chlorine.
C. cobalt.
D. fluorine.
E. iodine.

50. The hormone that causes uterine muscle contraction during child birth is referred to as
A. anti diuretic.
B. luteinizing.
C. oestrogen.
D. oxytocin.
E. prolactin.

51. The littoral zone of the marine habitat is sub-divided into
A. 2.
B. 3.
C. 4.
D. 5.
E. 6.

52. The pericycle in herbaceous stem is composed mainly of
A. collenchyma.
B. palisade cell.
C. pith.
D. sclerenchyma.
E. spongy cell.

53. .A part of the light microscope where specimens are mounted for viewing is referred to as the
A. base.
B. handle.
C. mirror.
D. objective.
E. stage.




a(i).State four methods of conserving wildlife.
(ii).Define sexual reproduction.
(iii).Name the two muscles that bring about movement of the forelimb

b. A man accidentally steps on a red hot object and suddenly removes his leg. Explain the process involved in his action.
(i).Outline three importance of transpiration to plants.
(ii).Mention two ways of controlling soil erosion.


a(i).Define the term metamorphosis.
(iiiState four effects of testosterone.
(iii).Enumerate four functions of the mammalian liver.

b.List three excretory products in plants.
(I).list three excretory products in plants
(ii). A man spins round a tree several times and feels dizzy, explain the cause of his dizziness.


a(i).Name three methods of respiration in toad.
(ii).State two differences between wind pollinated and insect pollinated flowers.
(iii).List two types of placentation in flowering plants.

(i).Explain the process of image formation in the human eye.
(ii).Name three types of heterotrophic nutrition.


a.(i).with the aid of diagram only illustrate the water cycle.
(ii).Name two types of fertilization in animals.

(i).Explain the process of fruit formation in flowering plants.
(ii). Name four constituents of the mammalian blood

a.(i).State four characteristics of enzymes.
(ii).State Mendel’s first law of inheritance.
(i).A pure breed of brown coloured cat(BB) was crossed with a pure breed of white coloured cat (bb). By means of crossing, show the genotypic and phenotypic ratios of F1 and F2 generations.

(i).Name three agricultural practices that deplete soil fertility.
(ii). List three courtship behaviours in animals.

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