1992 - WAEC Biology Past Questions and Answers - page 3
21
The following are features of the tropical rain forest except
A
abundant water supply
B
loose and moist soil
C
short trees growing benealth tall trees
D
scanty trees with small leaves
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22
The following are features of Northern Guinea Savanna except
A
presence of tall trees with thick bark
B
bare soil with very few trees
C
presence of fire-resistant trees
D
abundant herbivores
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23
Which of the following explains the term pyramid of numbers?
A
the number of organisms in a trophic level
B
the relationship between plants in different trophic levels
C
the number of saprophytes and parasites in a habitat
D
the number of predators in a habitat
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24
In which of the following processes is carbondioxide not given out?
A
respiration in plants
B
decay of organism
C
burning of organic matter
D
burning of fuels
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25
Sea water taken in by a living organism can berecycled into the atmosphere through all the following processes except
A
Sewage
B
Industrial wastes
C
Fertilizers
D
Crude oil
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26
Which of the following is not an adaptation of plants or animals to desert environment?
A
Well developed tap root system
B
small leaves with thick epidermis
C
Stems with spike-like leaves
D
Metabolic waste in the form of uric acid in some animals
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27
Which of the following is not an adaptation of plants or animals to desert environment?
A
Well developed tap root system
B
Small leaves with thick epidermis
C
Stems with spike-like leaves
D
Metabolic waste in the form of uric acid in some animals
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28
A climax community is characterised by
A
a stable composition of plant and animal species
B
rapid changes in the composition of species
C
constant changes in appearance of the habitat
D
different species occurring at different times
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29
Which of the following is not a characteristic of overcrowding in plant and animal community?
A
Population outstripping available space
B
Population exceeding available food
C
Competition within the population
D
increase in primary production
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30
The use of predators or parasites to control pests in the farm is known as
A
predator control
B
chemical control
C
biological control
D
animal control
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