2007 - WAEC Biology Past Questions and Answers - page 5
41
Which of these values in kj/m2 likely represents the energy content of the producers in a habitat?
A
5033
B
100
C
12
D
10
42
The major pollutant around airport residential areas is
A
oil spillage
B
soot
C
noise
D
dust
43
The effect of chlorofluorocarbon is
A
reduction of oxygen concentration in the atmosphere
B
depletion of the ozone layer
C
screening of ultra violet rays
D
increase in carbon dioxide concentration
44
The order of primary succession by plants in a very dry habitat is
A
xerophytes → mesophytes shrub
B
mesophytes → xerophytes → shrub
C
mesophytes → shrub -> xerophytes
D
xerophytes → shrub → mesophytes
45
A population which exceeds its carrying capacity and then collapses is represented graphically as a
A
bell shaped curve
B
skewed curve
C
s-shape curve
D
linear curve
46
Which of the following infections would not respond to an antibiotic treatment?
A
Gonorrhoea
B
Measles
C
Diarrhoea
D
Tuberculosis
47
The vector of the sleeping sickness disease parasite is the
A
cockroach
B
mosquito
C
black fly
D
tse-tse fly
48
Which of the following bacteria lives in the root nodules of leguminous plants?
A
Azotobacter
B
Nitrobacter
C
Rhizobium
D
Nitrosomonas
49
Endangered species are organisms that ought to be
A
hunted
B
killed
C
poached
D
protected
50
Which of the following substances is not a conservable natural resource?
A
Minerals
B
Air
C
Soil
D
Water
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