2009 - WAEC Biology Past Questions and Answers - page 5
41
Which of the following features is not an adaptation of plants to aquatic habitat?
A
Breathing roots for entry of air
B
Flowers raised above water for the purpose of pollination
C
Spongy tissues containing gases for buoyancy
D
Hairy structures on the leaves to reduce water loss
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42
The following habitats can be used in the study of succession except
A
savanna grassland
B
abandoned farmland.
C
a pond
D
a well cultivated land
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43
Population growth rate may be defined as the
A
ortality rate per unit area over a period
B
number of times an organism occurs within a given period
C
number of a particular species per unit area
D
net rate of natality and mortality in the habitat over a period.
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44
In ecological succession, since Iichens grow on bare rock, they are considered to be
A
primary consumers
B
pioneer organisms
C
climax organisms
D
producers
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45
Which of the following factors will most likely lead to overcrowding within a population?
A
Absence of predators
B
Emigration
C
Food shortage
D
Absence of territorial behaviour
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46
A species whose populations has become so small that it may become extinct if not protected is a/an
A
special species
B
dangerous species
C
endangered species
D
important species
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47
Which of the following practices does not contribute to the preservation and improvement of the environment?
A
Pollution reduction
B
Material recycling
C
Reforestation
D
Overgrazing
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48
Variation is important in human life and can be used for the following activities except
A
crime detection
B
population distribution
C
blood transfusion
D
determination of paternity
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49
An example of continuous variation is
A
fingerprint
B
tongue rolling
C
blood grouping
D
body size
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50
The outward appearance or an organism is referred to as
A
phenotype
B
genotype
C
dominance
D
recessiveness
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