1994 - WAEC Biology Past Questions and Answers - page 5
41
The gradual, cumulative, adaptive and heritable changes in an organism over a long period of time resulting
in emergence of new species is known as
A
adaption
B
survival
C
regeneration
D
variation
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42
The structure that produces the energy required by the cell is labelled
A
I
B
II
C
III
D
IV
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43
The structure labelled V is the
A
mitochondrion
B
ribosome
C
nucleus
D
centriole
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44
In which of the following organisms is the siphon found?
A
Tadpole
B
Pupa of mosquito
C
Tilapia
D
Crayfish
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45
Which of the following is not a pollution control measure?
A
Penalising those who dump refuse on water or land
B
Controlling the emission of smoke from automobiles and industries
C
Ensuring that there is no spillage of oil.
D
Establishing government agencies like Federal Environmental Protection Agency (FEPA)
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46
Which pair of structures contributes to balance in mammals?
A
Utriculus and Sacculus
B
Malleus and Stapes
C
Sacculus and cochlea
D
Utriculus and pinna
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47
Spermatogenesis and Oogenesis are both terms used to describe
A
mitosis
B
meiosis
C
mating
D
implantation
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48
Which of the following is not a continuous variation?
A
Height of plants
B
Skin colour
C
Ability to roll tongue
D
Length of fingers
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49
which of the following is not a conservable natural resource?
A
Water
B
Sunlight
C
Forest
D
Soil
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50
Which of the following plant diseases is indicated when grains of cereals are covered with a mass of
spores?
A
Smut
B
Mosaic
C
Maize streak
D
Fungal blast
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