1993 - WAEC Biology Past Questions and Answers - page 4
31
Which of the following best describes a marine habitat? A large body of water A
A
which has no distinctive colour or taste
B
with high concentration of salt
C
with tittle suspended materials
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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
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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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In which of the following processes is carbondioxide not given out?
C
Burning of organic matter
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Sea water taken in by a living organism can be recycled into the atmosphere through all the following
processes except
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Which of the following water pollutant may contain organisms that cause dysentery?
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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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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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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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The use of predators or parasites to control pests in the farm is known as
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