2003 - WAEC Biology Past Questions and Answers - page 3
21
Which of the following values showing the total biomass of organisms in a food chain represents the secondary consumer?
A
40,000
B
3,000
C
20
D
1
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22
Which of the following environmental factors is not considered in a terrestial habitat?
A
Temperature
B
Sunlight
C
Humidity
D
Turbidity
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23
The gas produced during decomposition of matter is
A
hydrogen sulphide
B
carbon monoxide
C
chlorine
D
oxygen
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24
Fish cannot survive on land because it has
A
a body covered with scales
B
a streamlined body
C
no lungs
D
no walking appendages
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25
Pneumatophores are essential for
A
nutrition
B
movement
C
breathing
D
growth
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26
Which of the following will have the least effect on the rate of change of the numbers in a population?
A
food supply
B
mutation
C
predation
D
disease
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27
Competition among individuals of a population increases the
A
number of organisms
B
survival of the fittest
C
availability of nutrient supplied
D
enlargement of the territory
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28
Rabbits cannot survive in an aquatic because they have
A
fore-and hind-limbs
B
no gills
C
no fins
D
no scales
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29
Viruses are pathogens of the following diseases except
A
measles
B
smallpox
C
poliomyelitis
D
tuberculosis
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30
Renewable resources are formed by
A
animals that reproduce sexually
B
organisms confined to forest reserves
C
organisms that are constantly regenerating themselves
D
plants and animals that can reproduce sexually
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