2001 - WAEC Biology Past Questions and Answers - page 3
21
The effect of the contraction of the muscles of the diaphram is that
A
he volume of the thoracic cavity increases.
B
more carbon dioxide is expelled through the nostrils
C
the rib cage is drawn inwards
D
the intercostal muscle becomes relaxed
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22
Which of the following is an excretory product of Amoeba?
A
Urea
B
Ammonia
C
Uric acid
D
Amino acid
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23
Which of the following processes occurs when the body temperature of a mammal rises above the normal?
I The arterioles in the skin dilate. II Sweat production is reduced. III The erector muscles contract.
A
I only
B
II only
C
I and III only
D
II and III only
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24
The following functions are associated with the liver except
A
regulation of blood sugar
B
production of heat
C
production of fibrinogen
D
production of vitamin
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25
Short-sight could be corrected with the use of
A
convex lens
B
cylindrical lens
C
concave lens
D
bifocal lens
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26
Which of the following statements about the maize grain is not correct?
A
undergoes hypogeal germination
B
is a fruit
C
is non-endospermous
D
has pericarp fused with the testa
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27
In mammals, fertilization usually occurs in the
A
cervix
B
vagina
C
uterus
D
oviduct
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28
Which of the following vertebrates incubate their eggs?
A
Mammals
B
Birds
C
Amphibians
D
Reptiles
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29
Which of the following is an agent of pollination of grasses?
A
Insects
B
Water
C
Wind
D
Mammals
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30
The spinneret found in the caterpillar of butterfly is used for
A
protection against predators
B
feeding on vegetation
C
movement on twigs
D
production of silk thread
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