1991 - JAMB Biology Past Questions and Answers - page 3
21
After 30 minutes, the level of sugar solution in the above figure will
A
rise in x only
B
rise in Y only
C
be the same in X and Y
D
fall in Y
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22
A
diffusion
B
osmosis
C
active diffusion
D
osmoregulation
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23
Fibrinogen and prothrombin play important roles in the
A
deamination of proteins
B
clotting of blood
C
detoxication of substance
D
storage of vitamins
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24
Deoxygenation blood flows into the right and left lungs through the
A
pulmonary vein
B
vena cava
C
pulmonary artery
D
subclavian vein
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25
Which of the following is a plant excretory product?
A
Oil
B
Cytokinin
C
Resin
D
Amino acids
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26
The movement of the whole organism to an external stimulus is termed
A
tropism
B
a taxis
C
a nastic movement
D
a phototropic movement
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27
Which of the following vertebrae lacks a centrum?
A
Atlas
B
Axis
C
Thoracic
D
Lumbar
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28
The function of the epididymis in mammals is the
A
expulsion of urine
B
storage of sperms
C
circulation of blood
D
activation of sperms
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29
A collection of achenes formed from several carpels of a flower is
A
a multiple fruit
B
an aggregate fruit
C
a shizocarp
D
a simple fruit
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30
Vegetation propagation is described as asexual reproduction because
A
reproductive organs are not involved
B
new individuals are not formed
C
many new plants are produced
D
there is no exchange of genetic materials
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