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NECO Biology Answers 2022 [Theory & Objectives]

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NECO Biology Answers 2022

1. Plants are classified into the following classes except

(a)Bryophyte.

(b) Coelenterate.

(c) pteridophyta.

(d) thallophyta.

(e) Spermatophyte.

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

(a) Cambium

(b) cellulose

(c) cortex

(d) chloroplast

(e) phloem

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

(a)Collenchyma

(b) phloem

(c) pith

(d) sclerenchyma

(e) xylem.

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

(a)Chloroplast

(b) Endoplasmic reticulum

(c) Mitochondrion

(d) Ribosome (e) Vacuole

5. The following conditions are necessary for photosynthesis except

(a) Carbon(iv)oxide.

(b) chlorophyll

(c) light energy

(d) oxygen

(e) water

6. Which of the following organisms carries out photosynthesis?

(a) Amoeba

(b)Euglena

(c) paramecium

(d) plasmodium

(e) Volvox.

7. Which of these is an amphibian?

(a) Fish

(b) Lizard

(c) Rat

(d) Snake

(e) Toad

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

(a) Apocarpous

(b) monocarpous

(c) polycarpous

(d) pistillate

(e) syncarpous

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

(a) Chemotropism

(b) geotropism

(c) hydrotropism

(d) phototropism

(e) thigmotropism

10. Which of the following is a bryophyte?

(a) Bladder wort

(b) Fly trap

(c) Liver wort

(d) Pitcher

(e) Sundew

11. Cellular respiration occurs in the

(a) Chloroplast

(b) endoplasmic reticulum

(c) food vacuole

(d) mitochondrion

(e) nucleus

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

(a) Capsule

(b) leaf

(c) rhizoid

(d) seta

(e) stalk

13. Exoskeleton is a characteristic feature of

(a) Amoeba

(b) earthworm

(c) hydra

(d) millipede

(e) tapeworm

14. Which of the following influences growth in plants?

(a) Acetic acid

(b) Auxins

(c) Chlorophyll

(d) Ethylene

(e) Latex

15. Land snail belongs to the phylum

(a) Annelida

(b) Arthropoda

(c) Echinodermata

(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

(c) homogamy

(d) protandry

(e) protogyny

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

(a) Flowering

(b) fruiting without fertilization

(c) ripening of fruits

(d) root formation

(e) stem elongation.

NECO Biology Answers 2022

Use the diagram below to answer questions 18 and 19.

18. The diagram represents the internal structure of a

(a) Flower

(b) fruit

(c) leaf

(d) root

(e) stem

19. The part labeled I is the

(a) Cortex

(b) endodermis

(c) phloem (d) root hair (e) xylem

20. Which of these is a water soluble vitamin?

(a) A

(b) C

(c) D

(d) E

(e) K

21. The following diseases are airborne except

(a) Clolera

(b) measles

(c) meningitis

(d) pneumonia

(e) small pox.

22. The excretory organ of insects is called

(a) Contractile vacuole

(b) flame cell

(c) kidney

(d) malphighian tubule

(e) nephridium

23. Which of these animals undergo metamorphosis

(a) Fish

(b) fowl

(c) lizard

(d) Rat

(e) Toad

24. Villi are finger-like structures found in the

(a) Large intestine

(b) rectum

(c) small intestine

(d) stomach

(e) tongue.

25. In mammals, sperms are formed in the

(a) Cowper’s gland

(b) scrotal sac.

(c) seminal vesicle

(d) seminiferous tubules

(e) vas deferens

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

(a) Cerebellum

(b) cerebrum

(c) Olfactory lobe

(d) spinal cord

(e) Thalamus

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

(a) Iron

(b) magnesium

(c) nitrogen

(d) potassium

(e) Sulphur

28. Which of the following diseases is not sexually transmitted

(a) AIDS

(b) Hepatitis

(c) Herpes

(d) influenza

(e) Syphilis

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

(a) Drones

(b) king

(c) Queen

(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

(c) flame cell

(d) malphigian tubule

(e) nephridium

31. The mode of nutrition of mushroom is

(a) autotrophic

(b) epiphytic

(c) parasitic

(d) saprophytic

(e) symbiotic

32. The earthworm is an example of

(a) Annelida

(b) Coelenterata

(c) Mollusca

(d) nematoda

(e) Platyhelminthes

33. Fat and oil are also known as

(a) Amino

(b) fatty acids

(c) glycerol

(d) lipids

(e) carbohydrates

34. Gaseous exchange in the lungs occurs at the

(a) Alveolus

(b)bronchus

(c)bronchiole

(d) larynx

(e) trachea

35. The following are pigment except

(a) Auxin

(b) chlorophyll

(c) chromatophores

(d) haemoglobin

(e) melanin

neco biology questions and answers
Use the diagram below to answer questions 36 – 38.

36. The type of placentation shown above is found in

(a) cana lily

(b) orange

(c) pawpaw

(d) pride of Barbados

(e) sunflower

37. the part labeled x is the

(a) ovule

(b) petal

(c) placenta

(d) sepal

(e) stamen

38. the type of placentation represented in the diagram is

(a) axile

(b) basal

(c) free central

(d) marginal

(e) parietal

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

(a) allometric

(b) apical

(c) isometric

(d) primary

(e) secondary

40. carnassial teeth are found in

(a) dog

(b) cow

(c)goat

(d) man

(e) sheep

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

(a) Backbone

(b) Limbs

(c)Ribs

(d) Skull

(e) Sternum

Use the diagram below to answer questions 42 and 43

2020 neco biology questions and answers
42. The part labeled ii is the

(a) Bone

(b) hyaline cartilage

(c) ligament

(d) synovial cavity

(e) synovial membrane

43. The function of the part labeled iii is to

(a) Soften the bones

(b) join bones together

(c) lubricate joints

(d) protect bones from wearing

(e) reduce friction at joints

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

(a) Choroids

(b) cornea

(c) lens

(d) pupil

(e) retina

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

(a) Cowper’s gland

(b) epididymis

(c) prostate gland

(d) seminal vesicle

(e) vas deferens.

46. An organ in bird that grinds its food is

(a) Caecum

(b) crop

(c) gizzard

(d) kidney

(e) liver

47. Which of the following animals exhibit basking

(a) Cat

(b) Cow

(c) Duck

(d) Eagle

(e) Lizard

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

(a) Dilation of pupil of eye.

(b) inhibition of saliva secretion

(c) reduction of blood pressure

(d) reduction of urine output

(e) stimulation of ejaculation

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

(a) Excretion

(b) osmoregulation

(c) pH regulation

(d) reproduction

(e) thermoregulation

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

(a) Cerebellum

(b) cerebrum

(c) corpus callosum

(d) medulla oblongata

(e) pons varolii

51. Haemorrhage is caused due to the deficiency of vitamin

(a) A

(b) C

(c) D

(d) E

(e) K

52. The control method of pests using predators is called

(a) Biological

(b) chemical

(c) cultural

(d) mechanical

(e) physical

53. The following are vectors except

(a) Black fly

(b) butterfly

(c) housefly

(d) mosquito

(e) tsetse fly

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

(a) Beri beri

(b) kwashiorkor

(c) night blindness

(d) rickets

(e) scurvy

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

(a) Carl Linneaus

(b) Charles Darwin

(c) Gregor Mendel

(d) Jean Lamarck

(e) Robert Hooke

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

(a) Blood transfusion

(b) crime detection

(c) determination of paternity

(d) longevity

(e) marriage

57. Which of these is not a pollutant

(a) Carbon dioxide

(b) Lead oxide

(c) Nitrogen gas

(d) Nitrogen oxide

(e) sulphur dioxide

58. The topmost layer of a typical soil profile is

(a) Clay

(b) coarse sand

(c) fine sand

(d) gravel

(e) humus

59. Plants that survive in marine habitats are called

(a) Halophytes

(b) hydrophytes

(c) mesophytes

(d) saprophytes

(e) xerophytes

60. The felling of trees in a forest is called

(a) Afforestation

(b) deforestation

(c) desertification

(d) forest pruning

(e) re-afforestation

PAPER II

ESSAY

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

(i) Gene

(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

(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 number in the comment box.

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