Biology 2020 Past Questions | WAEC

Study the following Biology past questions and answers for JAMBWAEC  NECO and ICAN. Get prepared with official past questions and answers for upcoming examinations.

16. The part of the mammalian kidney that stores urine is the 

  • A. capsule
  • B. medulla
  • C. pelvis
  • D. bladder

17.  The properties of endocrine system include the following except 

  • A. secretion of hormones
  • B. transportation by blood to target organ
  • C. having specific effect
  • D. release of secretion into ducts

18.  The part of the central nervous system that controls unconscious actions in humans is the 

  • A. cerebellum
  • B. cerebrum
  • C. spinal cord
  • D. optic nerves

19.  What happens when the ciliary muscles of the eye contract? The 

  • A. lens become more concave
  • B. lens become more convex
  • C. lens gets a longer focal length
  • D. suspensory ligament becomes tight

20.  The diagram below is an illustration of a part of a flower. Study it and answer the question below;

FLOWER

The function of the part labeled I is 

21.  The part labeled II is the 

  • A. unfused stigma
  • B. fused style
  • C. fused ovaries
  • D. unfused anther

22.  The reagent used in testing for carbon (IV) oxide is 

  • A. copper sulphate solution
  • B. lime water
  • C. hydrochloric acid
  • D. sodium hydroxide solution

23.  Oxygen comes out of the stomata during photosynthesis through the process known as 

  • A. diffusion
  • B. transpiration pull
  • C. osmosis
  • D. active transport

24.  The first stable product of photosynthesis is

  • A. starch
  • B. fructose
  • C. glucose
  • D. sucrose

25.  An example of a trace elements is

  • A. potassium
  • B. calcium
  • C. magnesium
  • D. copper

26.  Which of the following statements about a mixture of a protein-digesting enzyme and starch solution would be correct? The protein-digesting enzyme

  • A. has no effect on the starch solution
  • B. leads to the production of amino acids
  • C. leads to the production of glucose
  • D. digest the starch

27.  The mutualism type of relationship is different from a parasitic relationship because in mutualism

  • A. both organisms involved benefit
  • B. none of the organisms benefits or harm each other
  • C. both organisms harm each other
  • D. only one of the organisms is harmed

13. The set-up can measure comparatively the rate of 

  • A. evaporation from leaves on a single shoot under different experimental conditions
  • B. salt uptake by shoots from different plants
  • C. transpiration of a single shoot of a plant under different experimental conditions
  • D. water uptake by roots of different plants

28.  The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism

                Number in the habitat

 

 habitat W

habitat Y

Plankton 

126

0

Antelope

0

51

Water flea

10

0

Tilapia

23

0

Lion

0

6

Frog

6

0

Grass

0

250

What type of habitat is W?

  • A. Rainforest
  • B. Pond
  • C. Desert
  • D. Ocean

29. The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism

                Number in the habitat

 

 habitat W

habitat Y

Plankton 

126

0

Antelope

0

51

Water flea

10

0

Tilapia

23

0

Lion

0

6

Frog

6

0

Grass

0

250

 

Which of the following statements about habitat W is correct? The 

  • A. absence of lions and antelopes shows that the habitat is terrestrial
  • B. presence of Tilapia and planktons shows that the habitat is not aquatic
  • C. type of organisms present indicate that habitat is aquatic
  • D. absence of grasses indicates that the habitat is terrestrial

30. The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

The number of lions and antelopes in habitat Y shows that the lion 

  • A. is the prey while the antelope is the predator
  • B. is the predator while the antelope is the prey
  • C. and the antelope are preys to each other
  • D. and the antelopes are predators

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