2006 - WAEC Biology Past Questions and Answers - page 2
11
Which of the following processes does not contribute
towards growth?
towards growth?
A
Cell division
B
Cell enlargement
C
Cell differentiation
D
Cell plasmolysis
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12
The aspects of growth in living organisms include all
the following processes except
the following processes except
A
increase in dry weight
B
reversible increase in size
C
irreversible increase in length
D
increase in number of cells
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13
Support in young herbaceous plants is provided by
A
translocation
B
guttation
C
turgidity
D
osmosis
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14
Which of the following heart structures is best adapted
to cope with double circulation?
to cope with double circulation?
A
One auricle and one ventricle
B
Two auricles and one ventricle
C
Two auricles and partially divided ventricle
D
Two auricles and two ventricles
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15
Which of these factors does not contribute towards
the ascent of water in plants?
the ascent of water in plants?
A
Root pressure
B
Capillarity
C
Transpiration pull
D
Turgor pressure
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16
Gaseous exchange occurs through the following structures in some organisms except
A
spiracle and tracheae
B
alveoli and lungs
C
stomata and lenticels
D
chloroplast and plastids
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17
Which of the following organs in mammals is not excretory in function?
A
Liver
B
Kidney
C
Pancreas
D
Lungs
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18
The ventricles of the mammalian heart have thicker
muscular walls than the auricles because the
muscular walls than the auricles because the
A
ventricles are larger
B
ventricles receive more blood
C
ventricles pump blood to longer distances
D
auricles have smaller capacity
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19
Which of the following substances is not an excretory product in mammals?
A
Carbon dioxide
B
Water
C
Faeces
D
Urea
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20
An organism which maintains a constant temperature irrespective of environmental temperature fluctuation is
A
an insect
B
a mammal
C
an amphibian
D
a fish
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