2004 - WAEC Biology Past Questions and Answers - page 5
41
Plants found in the aquatic habitat are generally referred to as
A
epiphytes
B
halophytes
C
xerophytes
D
hydrophytes
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42
When a farmer sprays crops with a pesticide, the pesticide becomes
A
poisonous to all plants
B
is broken down by soil algae
C
easily washed down into lakes and rivers
D
absorbed by bodies of mammals
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43
Which of the following methods is best for the determination of population density of Tridax in an open held?
A
transect
B
quadrat
C
Sweep-net
D
pit-fall
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44
If a piece of abandoned farmland went through a series of floral and faunal changes and became established with
permanent plant and animal population, it could be said to have undergone
permanent plant and animal population, it could be said to have undergone
A
transformation
B
succession
C
competition
D
evolution
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45
The drugs which inhibit the growth of disease-causing organisms and thus used in the treatment* of infections are
referred to as
referred to as
A
antibodies
B
antibiotics
C
antitoxic
D
septics
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46
An abandoned refuse dump mag' be a good site for an intending vegetable farmer because
A
. very little manual work would be done by the farmer
B
microbial activity had released nutrients into the soil
C
the roots of vegetable seedlings easily get enough light
D
refuse dumps possess plenty of gas which scares away rodents
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47
The following are natural resources except
A
rubber
B
soil
C
water
D
cellophane
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48
Which of the following practices does not contribute to intensive depletion of forest resources in West Africa?
A
Use of powerful tools for felling trees
B
regrowing of forest trees
C
clearance of forests for cash crops
D
use of fire or hunting in forests
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49
Tropical rain forests can be conserved by the following practices except
A
agroforestry
B
deforestation
C
shifting cultivation
D
crop rotation
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50
Which of these physiological variations is sex-linked?
A
albinism
B
blood groups
C
sickle-cell anaemia
D
haemophilic condition
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