1992 - JAMB Biology Past Questions and Answers - page 2
11
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
A
stomata
B
lenticels
C
air space
D
guard cell
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12
Fungi are heterotropic because they
A
have no leaves
B
lack roots
C
are filamentous
D
lack chlorophyll
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13
The major site of photosynthesis in the leaf is the
A
palisade parenchyma
B
mesophyll parenchyma
C
upper epidermis
D
lower epidermis
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14
5 cm3 dilute sodium hydroxide solution and 5 cm3 one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of
A
glucose
B
starch
C
fat
D
protein
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15
The blood vessel which carries blood from the alimentary canal to the liver is the
A
hepatic artery
B
hepatic vein
C
hepatic portal vein
D
mesenteric artery
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16
Gaseous exchange in Aves occurs in the
A
tracheoles
B
bronchi
C
air sacs
D
trachea
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17
In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to CO2 and
A
water
B
glycerol
C
ethanol
D
citric acid
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18
The excretory organ in insects is the
A
kidney
B
malpighian tubule
C
flame cell
D
nephridium
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19
A
sweat gland
B
sebaceous gland
C
blood vessel
D
nerve fibre
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20
A
2
B
3
C
4
D
5
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