WAEC - Biology (2020)

1
The cell as the basic unit of life consists of 
Answer
(C)
cytoplasm and nucleus
2

Use the following Classes of Arthropoda to answer the question below

I. Crustacea II. Insecta III. Arachinda IV. Chilopoda

 

Which members of the classes live mainly in an aquatic habitat?

 

Answer
(A)
I
3

Use the following Classes of Arthropoda to answer the question below

I. Crustacea II. Insecta III. Arachinda IV. Chilopoda

 

Which of the classes is characterised by the possession of two pairs of antennae?

Answer
(A)
I
4
The organism with spiral chloroplasts and nucleus suspended by cytoplasmic strands is
Answer
(B)
Spirogyra
5
The network of double membrane that conveys materials through the cytoplasm is the 
Answer
(D)
endoplasmic reticulum
6

The diagram above is an illustration of the longitudinal section of a plant organ. Study to answer the question below.

 

Food is stored in the part labeled

Answer
(B)
II
7

The diagram above is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

The plant is a? 

Answer
(B)
bulb
8

The diagram below is an illustration of the longitudinal section of a plant organ. Study it and answer the question below;

 

The part labeled i is the 

Answer
(B)
scale leaf
9
Which of the following materials is not a living semi-permeable membrane?
Answer
(D)
Sheet of cellophane
10
In an experiment, mould and yeast cells were transferred into an environment with low oxygen concentration. After a few days, the mould dies while the yeast cells did not. Which of the following statements best explains the following observation.
Answer
(C)
Respiration can take place in yeast cells in the absence of oxygen
11
Which of the following tissues does not provide support in flowering plants?
Answer
(D)
Phloem
12

The diagram is an illustration of an experimental set-up. Study it and answer the question;

The set-up directly measure 

 

 

Answer
(A)
transpiration of water by the shoot
13

The diagram above is an illustration of an experimental setup. Study it and answer the question below;

The setup can measure comparatively the rate of 

Answer
(C)
transpiration of a single shoot of a plant under different experimental conditions
14
The respiratory organ of a cockroach
Answer
(B)
trachea
15
The excretory product of some reptiles, birds and insects is
Answer
(D)
uric acid
16
The part of the mammalian kidney that stores urine is the 
Answer
(D)
bladder
17
The properties of endocrine system include the following except 
Answer
(D)
release of secretion into ducts
18
The part of the central nervous system that controls unconscious actions in humans is the 
Answer
(C)
spinal cord
19
What happens when the ciliary muscles of the eye contract? The 
Answer
(B)
lens become more convex
20

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

 

The function of the part labeled I is 

Answer
(B)
attract pollinators
21

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

 

The diagram is an illustration of a part of a flower. Study it and answer  the...

 

 

The part labeled II is the 

Answer
(C)
fused ovaries
22
The reagent used in testing for carbon (IV) oxide is 
Answer
(B)
lime water
23
Oxygen comes out of the stomata during photosynthesis through the process known as 
Answer
(A)
diffusion
24
The first stable product of photosynthesis is
Answer
(C)
glucose
25
An example of a trace elements is
Answer
(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
Answer
(A)
has no effect on the starch solution
27
The mutualism type of relationship is different from a parasitic relationship because in mutualism
Answer
(A)
both organisms involved benefit
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?

 

Answer
(B)
Pond
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 

Answer
(C)
type of organisms present indicate that habitat is aquatic
30

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

 

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

Answer
(B)
is the predator while the antelope is the prey
31

The diagram above illustrates an ecological instrument. Study it and answer the question below;

 

A disadvantage of the abiotic factor measured by the instrument is that it

 

Answer
(C)
leads to flooding when in excess
32

The diagram below is an illustration of an ecological instrument. Study it an answer the question below;

The diagram above illustrates an ecological instrument. Study it  and answer the question below;   A disadvantage...

When the instrument is in use, it is usually? 

Answer
(A)
placed slightly above soil level
33
Soil with the finest texture is?
Answer
(B)
clay
34
The position occupied by an organism in food chain is the
Answer
(C)
trophic level
35
The depletion of the ozone layer will result in the earth surface receiving more
Answer
(C)
ultraviolet rays
36

Use the list of insects below to answer the question below; 

I. Cotton stainer  II. Honeybee III. Termite IV. Weevil

The insects whose activities are both beneficial and harmful to humans are;

Answer
(B)
II and III
37

Use the list of insects below to answer the question below; 

I. Cotton stainer  II. Honeybee III. Termite IV. Weevil

Which of the insects destroys grains?

Answer
(D)
IV
38
Conservation of natural resources does not 
Answer
(D)
threaten the survival of species
39
A company was prohibited from producing bags made from natural leopard skin. This is an attempt to conserve 
Answer
(C)
wildlife
40
Which of the following substances is not a conservable natural resource?
Answer
(A)
Mineral
41
A child that can receive blood donation from anybody belongs to the blood group 
Answer
(D)
AB
42
Variation which exhibits a wide range from one extreme to the other is 
Answer
(C)
continuous variation
43
Measurements of height and weight of students in a class show 
Answer
(B)
continuous variation
44
Which of the following statements about chromosomes is correct?
Answer
(B)
The number present in a specie is constant
45
Which of the following diseases can be inherited?
Answer
(C)
Sickle cell anemia