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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

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

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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