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2006 - WAEC Biology Past Questions and Answers - page 2

11

Which of the following processes does not contribute
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

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?

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?

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

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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