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2012 - WAEC Biology Past Questions and Answers - page 5

41

The best title for the above diagram is

A
terrestrial food web
B
terrestrial food chain
C
aquatic food web
D
aquatic food chain
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42

How many food chains are in the diagram?

A
Three
B
Four
C
Five
D
Six
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43

Plants with breathing roots are characteristic features of vegetation in

A
tropical grassland
B
temperate grassland
C
saltwater swamp
D
Tropical rain forest
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44

In which of the zones can very few organisms be found

A
I
B
II
C
III
D
IV
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45

Which of the following factors exerts a major effect on the distribution of living organisms in the habitat?

A
Salt
B
pH
C
Light
D
Rainfall
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46

The use of water closet and septic tanks is preferred to the use of
bucket and pit latrines because

A
it is cost effective
B
contaminated faeces are completely kept away from flies
C
the water for flushing contains chlorine which kills the germs
D
It prevents flies from breeding
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47

The detection of vibro cholera in public drinking water is a sign of

A
clean water
B
outbreak of disease
C
water pollution.
D
decayed organisms in the water
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48

Which of the following factors would be least likely to act as a density dependent limiting factor in a population of
mice?

A
Buildup of waste products
B
Predation
C
Parasitism
D
Unfavourable climate
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49

The primary cause of species endangerment is

A
disappearing habitats
B
increase in temperatures
C
acid rain
D
exposure to hazardous wastes
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50

The following pairs of traits are examples of continuous and discontinuous variations respectively except

A
eye Colour and body weight,
B
height and blood group
C
skin colour and fingerprints
D
bodyweight and tongue rolling.
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