2015 - WAEC Biology Past Questions & Answers - page 3

21
Which of the following components 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
CORRECT OPTION: b
22

Study the diagram above and answer the question

The structure labelled I is

A
a pitcher
B
an onion
C
a flower
D
a tendril
CORRECT OPTION: c
23
Which of the following organisms is an endo-parasite?
A
Tapeworm
B
Flea
C
Tick
D
Aphid
CORRECT OPTION: a
24
Which of the following organisms is an endo-parasite?
A
Tapeworm
B
Flea
C
Tick
D
Aphid
CORRECT OPTION: a
25
Oil applied to the surface of water kills the larvae of mosquitoes through
A
dehydration
B
poisoning
C
starvation
D
Suffocation
CORRECT OPTION: d
26
Which of the following natural resources is most readily available to all organisms?
A
Oil
B
Water
C
Air
D
Food
CORRECT OPTION: c
27
Which of the following resources is non-renewable?
A
Forest reserve
B
Mineral deposit
C
Water
D
Wild life
CORRECT OPTION: b
28
Soil erosion could be prevented by
A
flooding a farmland
B
cover-cropping
C
deforestation
D
leaving the soil bare
CORRECT OPTION: b
29
Which of the following statements about human blood groups 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
CORRECT OPTION: a
30
Which of the following traits is not inheritable? Ability to
A
taste PTC
B
roll the tongue
C
move the ear
D
rool the eyeball
CORRECT OPTION: d
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