2009 - JAMB Biology Past Questions and Answers - page 4
31
A health condition that is known to have resulted from gene mutation is
A
haemophilia
B
colour blindness
C
sickle-cell anaemia
D
anaemia
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32
Plants that grow in an area that is neither too wet nor too dry are
A
xerophytes
B
mesophytes
C
epiphytes
D
hydrophytes
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33
The part of a domestic fowl responsible for preventing heat loss is the
A
filoplume
B
contour feather
C
down feather
D
quill
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34
Which of the following animals is most adapted for water conservation?
A
earthworms
B
mammals
C
flatworms
D
insects
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35
The specialized pigment cells that are involved in colouration and colour change in animals
A
xanthophyl
B
chromatophores
C
chromatophyll
D
melanin
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36
During the dry season in the tropics, the body metabolism of some animals slows to a minimal level in a process referred to as
A
hibernation
B
aestivation
C
dormancy
D
senescense
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37
According to Darwin, the driving force behind evolutionary change is
A
natural selection
B
genetic drift
C
mutation
D
gene flow
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38
The structure that controls loss of water vapour during transpiration is labelled
A
l
B
ll
C
lll
D
lV
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39
The part labelled l is the
A
spongy mesophyll
B
upper epidemis
C
cuticle
D
vein
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40
Emulsification of fats takes place in the part labelled
A
l
B
ll
C
lll
D
lV
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