2004 - WAEC Biology Past Questions and Answers - page 3
21
The structure labelled VIII in the diagram is responsible for
A
vision
B
involuntary actions
C
speech
D
voluntary action
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22
Which of the following occurs when a person looks at a distant, dim object and then looks
at a much closer, bright object? In each eye, the pupil becomes
at a much closer, bright object? In each eye, the pupil becomes
A
larger, while the lens becomes thicker
B
larger, while the lens becomes thinner
C
smaller, while the lens becomes thicker
D
smaller while the lens becomes thinner
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23
The following insects undergo incomplete metamorphosis except
A
termite
B
cockroach
C
butterfly
D
locust
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24
The process by which fruits develop without fertilization is called
A
parthenocarpy
B
pathology
C
hermaphroditism
D
layering
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25
Which of the following groups contains only macro-nutrients?
A
phosphorus, nitrogen and molybdenum
B
manganese, copper and zinc
C
boron, sulphur and iron
D
calcium, magnesium and potassium
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26
A solution which contains all the required elements in their correct proportions is known as a
A
culture nutrient
B
growth medium
C
complete culture solution
D
nutrient solution
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27
The deficiency of manganese in plants results in
A
death of shoot
B
leaves turning yellow
C
stunted growth
D
poor root development
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28
Which of the following is not true about a potted plant left in the laboratory for one week without watering?
A
the cells of the plant will be turgid
B
there will be wilting of the plant
C
the leaves are likely to tum yellow
D
plant will not take in enough nutrients
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29
The deficiency of vitamin D and calcium ions in the diet of a human causes
A
anaemia
B
night-blindness
C
kwashiokor
D
rickets
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30
An organism is considered a heterotroph when it
A
feeds on inorganic food
B
feeds on already manufactured food
C
fixes atmospheric nitrogen
D
respires anaerobically
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