Free WAEC Biology objective Past Questions and Answers (+PDF)

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See the standard 50 WAEC objective Biology questions with answers and explanation or download 3 YEARS PDF at the bottom of this post for offline study.

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WAEC living organisms

1. Which of the organisms is not a protozoan?

A. Amoeba
B. Ascaris
C. Plasmodium
D. Paramecium

WAEC cell structure

2. The structure of the cell membrane is a _____

A. double layer and a double protein layer
B. middle bi-layer of protein with lipid layer on either surface
C. middle bi-layer of lipid with a protein layer on either surface
D. protein layer with two inner lipid layers

3. Which of the following cells is a specialized cell?

A. Amoeba
B. Plasmodium
C. Guard cell
D. Meristematic cell

WAEC living organisms

4. The following organisms have structures for movement except _____

A. Amoeba
B. Spirogyra
C. Volvox
D. Paramecium

WAEC cell structure

5. Which of the following statement about protoplasm of a cell is not correct? It _____

A. is a gelatinous mass
B. consist of cytoplasm and nucleus
C. is the liquid part of the nucleus
D. contain cellular organelles

WAEC cell environment

6. When a spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become _____

A. plasmolysed
B. turgid
C. shortened
D. elongated

The diagram below is an illustration of a crocodile. Use it to answer questions 7 and 8

WAEC animal adaptation

7. Which of the labelled part enables the animal to stay under water most of the time?

A. I, IV and V
B. I, II and V
C. I, III and IV
D. III, IV and V

WAEC classification of organism

8. Two characteristic features of the class to which the crocodile belongs are labelled _____

A. I and II
B. III and IV
C. II and IV
D. II and V

WAEC human excretion

9. Water and salt are both lost from the human body in _____

A. breath and sweat
B. breath and urine
C. breath, urine and sweat
D. sweat and urine

WAEC plant growth

10. Which of the following features could be used to determine the growth of a seedling?

A. Number of flowers
B. Number of leaves
C. Length of flowers
D. Length of radicle

The following diagrams show the sequence of events in cell division. Study the diagram and answer question 11

WAEC cell division

11. In which of the following cells is the division likely to take place?

A. Sperm cell
B. Blood cell
C. Muscle cell
D. Uterine cell

WAEC plant reproduction

12. A plant that commonly undergoes vegetative propagation by means of leaves is _____

A. Hibiscus
B. Bryophylum
C. Crotalaria
D. Spirogyra

The diagram below illustrates a part of the mammalian skeleton. Use it to answer questions 13 and 14

WAEC supporting tissues

13. The part of the mammalian skeleton illustrated in the diagram is the _____

A. atlas vertebrae
B. axis vertebrae
C. cervical vertebrae
D. thoracic vertebrae

14. The function of the part I is to _____

A. provide support to the spinal cord
B. provide surface for attachment of the muscle
C. carry the spinal cord
D. articulate with adjacent vertebrae

WAEC transport system

15. Blood pressure is higher in the arteries as a result of _____

A. stress
B. contraction and relaxation
C. blockage in the arteries
D. pressure of valves

WAEC plant hormones

16. A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting out uses _____

A. auxins
B. gibberellins
C. abscisin
D. cytokinin

WAEC nervous system

17. A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have affected the _____

A. nose by extension
B. olfactory lobes in the brain
C. passages from the nose to the brain
D. part of the skull near the nose

WAEC sense organs

18. Ability of the human eye to focus images accurately on the retina is called _____

A. astigmatism
B. myopia
C. adjustment
D. accommodation

WAEC plant classification

19. Which of the following characteristic feature is not associated with monocotyledonous plants?

A. Well differentiated sepals and petals
B. Presence of fibrous root system
C. Presence of narrow leaves
D. Floral parts are multiples of three

WAEC plant reproduction

20. The main difference between a seed and a fruit is that a fruit _____

A. is large while a seed is small
B. has two scares while a seed has one
C. is pigmented while a seed is not
D. can be dispersed by animals while a seed cannot

WAEC nutrient cycle

21. Which of the following processes removes carbon (IV) oxide from the atmosphere?

A. Burning fuels
B. Putrefaction
C. photosynthesis
D. respiration in plants

Use the information below to answer questions 22 – 24

A student used the following steps in testing for non-reducing sugar.

I. Added Benedict’s solution to the sugar solution
II. Added diluted hydrochloric acid to the sugar solution and boiled it
III. Added sodium hydroxide solution to the solution in II and boiled
IV. Added Benedict’s solution to the solution in III

WAEC food tests

22. Why did the student add the dilute hydrochloric acid to the sugar solution in step II? To ____

A. oxidize the sugar solution
B. hydrolyse the sugar solution
C. dry the sugar solution
D. increase the volume of the sugar solution

23. What is the importance of step II in the testing process? To _____

A. neutralize the sugar solution
B. soften the sugar solution
C. change the colour of the sugar solution
D. increase the acid content of the sugar solution

24. The colour change to be observed in step IV is _____

A. blue-black
B. brick red
C. purple
D. violet

WAEC digestive system

25. Which of the following organs of the alimentary canal is not correctly matched with its function?

A. Gall bladder – stores bile
B. Liver – stores glycogen
C. Appendix – releases enzymes
D. Teeth – grind food

26. A person suffering from obstruction of the bile is advised not to eat fats and oils because _____

A. bile digests fats and oils
B. fats and oil can only be absorbed when bile is absent
C. bile emulsifies fats and oil
D. bile adds water to digesting food

WAEC ecology

27. A community reaches a climax when _____

A. only pioneer organisms are present
B. new habitats are constantly being formed
C. there is an introduction of new plants and animals in the community
D. the composition and size of a community remains constant over a long period

28. Which of the following component make up an ecosystem?

A. Decomposers, animals and non-living factors
B. Living and non-living factors
C. Plants and non-living factors
D. Plants, decomposers and non-living factors

WAEC natural habitat

29. The major problem experienced by organisms living in small water bodies is _____

A. drying up
B. oxygen deficiency
C. scarcity of food
D. wave action

WAEC soil structure

30. The capillarity of a soil refers to _____

A. the particle size of the soil
B. how easily water passes through the soil
C. how well water rises up in the soil
D. proportion of water a soil holds

WAEC energy flow

31. An organism at the start of a food chain which provides the total input of energy into an ecosystem is the _____

A. sun
B. producer
C. consumer
D. decomposer

Study the diagram below and use it to answer questions 32 to 34

WAEC mode of nutrition

32. The mode of nutrition of the plant in the diagram is _____

A. photosynthetic and chemosynthetic
B. saprophytic and carnivorous
C. photosynthetic and carnivorous
D. chemosynthetic and saprophytic

WAEC plant adaptation

33. The structure labelled I is _____

A. a pitcher
B. an onion
C. a flower
D. a tendril

WAEC soil type

34. In which type of soil is the plant found? Soil that is _____

A. poorly aerated
B. waterlogged
C. exposed
D. nitrogen deficient

WAEC mode of nutrition

35. Which of the following organisms is an endo-parasite?

A. Tapeworm
B. Flea
C. Tick
D. Aphid

WAEC natural habitat

36. Oil applied to the surface of water kills the larvae of mosquitoes through _____

A. dehydration
B. poisoning
C. starvation
D. suffocation

37. Which of the following natural resources is most readily available to all organisms?

A. Oil
B. Water
C. Air 
D. Food

WAEC natural resources

38. Which of the following resources is non-renewable?

A. Forest reserve
B. Mineral deposit
C. Water
D. Wildlife

WAEC soil conservation

39. Soil erosion could be prevented by _____

A. flooding a farmland
B. cover-cropping
C. deforestation
D. leaving the soil bare

WAEC blood group

40. Which of the following statements about human blood group is not true?

A. A is dominant over B
B. O is recessive
C. B is dominant over O
D. A and B are co-dominant

WAEC heredity

41. Which of the following traits is not inheritable? Ability to _____

A. taste PTC
B. roll the tongue
C. move the ear
D. roll the eyeball

WAEC blood group

42. A woman with blood group A gives birth to a child with blood group O. Which of the following blood group cannot belong to the father?

A. A
B. B
C. AB
D. O

WAEC heredity

43. How many chromosomes will be in a gamete if the normal cell has four chromosomes?

A. 2
B. 4
C. 6
D. 8

Use the diagram below to answer questions 44 and 45

WAEC heredity

44. Which of the following statements about the cross is correct?

A. The gene for the spotted cat is recessive to the gene for the black cat
B. Black cat and spotted cat are co-dominant
C. The gene for the spotted cat is dominant over the gene for the black cat
D. The genotype for F1 are homozygous dominant

WAEC genotype

45. What are the genotypes of the parents if the gene for skin colour is H?

    Spotted Leopard	Black Panther

A.	HH		    hh
B.	HH		    Hh
C.	Hh		    Hh
D.	Hh		    hh

WAEC Mendel’s law

46. According to Mendel’s first law of inheritance, segregation of genes occurs when _____

A. tall plants are crossbred
B. short plants are crossbred
C. plants are crossbred
D. tall plants and short plants are crossbred

WAEC heredity

47. Which of the statements about sex-linked characters is not true?

A. They are usually borne on the X-chromosome
B. They are more common in males
C. Males are usually carriers
D. They are not usually carried on the Y-chromosome

In explaining the term camouflage, to a class, the diagram below showing four varieties P, Q, R and S of the same species of fish living amongst water plants in a river were used.

Use the diagram next to answer questions 48–50

WAEC animal adaptation

48. Which of the varieties is likely to increase most in number if a predatory fish is introduced in the river?

A. P
B. Q
C. R
D. S

49. Which of the varieties is most likely to outlive the other?

A. P
B. Q
C. R
D. S

50. The variety selected in question 49 will outlive the others because the _____

A. variety is the most beautiful
B. variety does not have markings
C. markings of the variety are similar to those of the environment
D. predator does not like eating the variety

• This past questions were extracted from the official WAEC 2015 Biology paper 1.

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