2009 - WAEC Biology Past Questions and Answers - page 3
21
The part of the ear which contains nerve cells sensitive to sound vibrations is the
A
cochlea
B
ampulla
C
tympanum
D
malleus
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22
Spectacles with convex lenses correct long-sightedness by
A
converging the light rays before they enter the eye.
B
diverging the light rays before they enter the eye.
C
reducing light intensity before it enters the eye
D
increasing light intensity before it enters the eye
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23
A seed of a flowering plant can best be described as
A
radicle and plumule
B
the developed ovule
C
the embryo and endosperm
D
developed ovary
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24
Which of the following processes removes carbon from the atmosphere?
A
Putrefaction
B
Photosynthesis
C
Volcanic eruption
D
Burning of fuels
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25
Which of the following cycles involves the process of precipitation and transpiration?
A
Water cycle
B
Carbon cycle
C
Nitrogen cycle
D
Oxygen cycle
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26
The mesophyll layer of a leaf consists of
A
wax and cutin
B
cells with lignified walls
C
irregularly shaped collenchyma cells.
D
photosynthetic parenchyma cells.
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27
Which of the following treatments would increase the rate of transpiration in a potted plant?
A
Placing it in a cold room
B
Placing it under a fan in a room
C
Putting it in a cupboard
D
Smearing grease on the lower surface of the leaves
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28
Pepsin is secreted as an inactive precursor called pepsinogen because
A
pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth
B
. all digestive enzymes pass through a precursor stage
C
pepsin is a proteolytic enzyme and might attack the stomach tissues
D
pepsin is not required in large quantities
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29
An organism whose source of carbon is inorganic is likely to be a/an
A
heterotrophic organism
B
autotrophic organism
C
symbiotic organism
D
parasitic organism
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30
Which of the following organisms is an endoparasite?
A
Mice
B
Mosquito
C
Ascaris
D
Dodder
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