2013 - WAEC Biology Past Questions and Answers - page 4
31
The frog is considered a better swimmer than the toad because it
A
has more pronounced webbed digits
B
has much longer and stronger hind limbs
C
lives in water most of the time
D
is more streamlined than the toad
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32
The bacteria that reduce nitrates in the soil into gaseous nitrogen are referred to as
A
nitrifying bacteria
B
denitrifying bacteria
C
putrefying bacteria
D
saprophytic bacteria
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33
A pyramid of numbers is constructed by
A
comparing living and non-living things
B
measuring productivity
C
conducting census
D
labelling the living organisms
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34
The main reason for immunizing children is to
A
destroy pathogens in their bodies
B
increase the production of white blood cells
C
stimulate the production of antibodies
D
simulate the production of antigens
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35
Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as
A
commensalism
B
epiphytism
C
mutualism
D
saprophytism
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36
Ascaris lumbricoides is a parasitic
A
flat worm
B
round worm
C
arthropod
D
elastic worm
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37
The following organisms are pests of plants except
A
birds
B
nematodes
C
bacteria
D
rodents
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38
The absence of alimentary canal in the parasitic flatworm can be attributed to the fact that
A
its body does not feed
B
it has no enzymes
C
its body absorbs digested food
D
it has suckers on the scolex
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39
Which of the following human activities would help prevent endangered species from extinction?
A
Uncontrolled killing of species
B
Regular clearing of the forest vegetation
C
Temporary maintenance of species in zoological gardens
D
Regular irrigation of their natural habitats
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40
Which of the following statements is not a reason for conserving wildlife?
A
Attraction of tourists into the country
B
Serving as a source of food
C
Serving as a source of income
D
increasing the amount of rainfall
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