2005 - WAEC Biology Past Questions and Answers - page 3
21
Which of the following organisms causes syphilis?
A
Mycobacterium tuberculosis
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In plant respiration occurs in
C
the stomata and lenticel only
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A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that
A
sunlight slows down water loss from the upper surface
B
the lower surface of the leaf has more stomata
C
Sunlight causes the stomata on the upper surface to close
D
stomata are not present on the upper surface of a leaf
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Which of the following takes place when a person’s body temperature rises above 37oC
A
Sweating and vasoconstriction
B
Panting and vasoconstriction
C
Sweating and vasodilation
D
Panting and vasodilation
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Which of the following glands secretes a substance into the blood stream of a frightened person?
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Reading the verdict of a case by a judge or magistrate is an example of
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Which of the following describes an example of fertilization in higher organisms?
A
Fusion of sperm and egg nuclei
B
Ejaculating of sperm into a female body
C
Male gametes germinating in the pollen tube
D
A pollen grain landing on a sticky stigma
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When both ovaries of the human female ovulate simultaneously and both ova are fertilized, then
A
identical twins are produced
B
fraternal twins are produced
C
Siamese twins are produced
D
the children produced are genetically identical
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Which of the following statements is not true of the light stage of photosynthesis?
A
Chlorophyll is energized by sunlight
B
Water molecules split into hydrogen and hydroxyl ions
C
Carbon (IV) oxide is reduced by hydrogen atoms in NADPH2
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Which of the following elements is required in large amounts by plants
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