1999 - WAEC Biology Past Questions and Answers - page 5
41
A known weight of soil sample was oven-dried to obtain a constant weight. The loss in weight was due to
loss of
A
organic matter only
B
water only
C
water and organic matter
D
inorganic matter and water
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42
Carbon is added to the atmosphere by the following processes except
A
respiration
B
burning
C
photosynthesis
D
volcanic eruption
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43
Which of the following is a means of measuring primary production?
A
Rate of reproduction of animals
B
Life span of an organism
C
Number of predators in an environment
D
harvested plants in a unit area
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44
A situation whereby some mammals remain inactive throughout dry and hot seasons is known as
A
aestivation
B
dormancy
C
burrowing
D
incubation
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45
Which of the following factors may not affect living organisms in an aquatic habitat?
A
Turbidity
B
Temperature
C
Humidity
D
Light
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46
Which of the following parasites is a flatworm?
A
Plasmodium
B
Trypanosoma
C
Ascaris
D
Schistosoma
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47
During prolonged exercises, glucose in the muscle is convened to
A
pyruvic acid
B
lactic acid
C
co- enzyme
D
ethanol
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48
Which of the following is an effect of carbon monoxide on man?
A
irritating the skin
B
Reducing oxygen carrying capacity of blood
C
Causing gene mutation
D
Destroying white blood cells.
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49
Which of the following is a renewable natural resources?
A
Air
B
Timber
C
Soil
D
Mineral
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50
Which of the following resources is competed for by organisms in the desert?
A
Light
B
Temperature
C
Oxygen
D
Water
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