2004 - WAEC Biology Past Questions and Answers - page 2
11
The xylem elements perform the function of transport but they also help to support plants because they
A
are internally located
B
are tubular
C
have rigid thick walls
D
constantly absorb water
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12
Excessive bleeding from an injury may be due to lack of vitamin
A
A
B
B
C
C
D
K
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13
The hepatic portal vein is often heavily loaded with food-nutrients because it carries blood
A
directly from the heart
B
from the liver to the heart
C
from the small intestine to the liver
D
from the liver to join the posterior vena cava
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14
The products of respiration are
A
nitrogen and water
B
nitrogen and carbon dioxide
C
water and oxygen
D
carbon dioxide and water
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15
Green plants lose water to the atmosphere through the process of
A
respiration
B
photosynthesis
C
transpiration
D
translocation
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16
The body temperature of a mammal has to be maintained at a fairly constant level because
A
excessive heat is continually lost by the body to the environment
B
their body temperature is always higher than that of the environment
C
evaporation of sweat cools the body
D
metabolic activities function best at certain temperature
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17
A urine sample of a patient, tested with Benedict/Felling solution, gave an orange coloured precipitate,
indicating the presence of
indicating the presence of
A
glucose
B
sucrose
C
lactose
D
maltose
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18
Which hormonal deficiency is likely to cause an accumulation of reducing sugar in the urine?
A
thyroxine
B
insulin
C
secretin
D
testosterone
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19
Which of the following structures occupies the neural canal of the vertebral column?
A
cerebellum
B
hypothalamus
C
medulla oblongata
D
spinal cord
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20
The structure labelled l in the diagram above is the
A
cerebellum
B
cerebrum
C
olfactory lobe
D
medulla oblongata
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