2002 - JAMB Biology Past Questions and Answers - page 3
21
The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry is the
A
eye
B
chorion
C
allantois
D
gill-silts
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22
Animals aestivate when the environment in which they live becomes
A
hot and dry
B
cold and wet
C
warm and humid
D
windy and snowy
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23
Examples of organisms in which extracellular digestion occurs are
A
fungus, loranthus and housefly
B
rhizopus, sponges and earthworm
C
roundworm, tapeworm and hydra
D
rhizopus, housefly and hydra
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24
The mammalian erythrocytes differ from the leucocytes at maturity because the erythrocytes are
A
discoid and nucleated
B
discoid and enucleated
C
amoeboid and nucleated
D
amoeboid and enucleated
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25
The presence of endoskeleton is characteristic of
A
invertebrata
B
vertebrata
C
insecta
D
coelenterata
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26
The capture and digestion of insects by a pitcher plant is a special form of nutrition termed
A
autotrophic
B
heterotrophic
C
chemosynthetic
D
saprophytic
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27
A
The flask must be of the conical type
B
Caustic soda can be replaced with distilled water
C
The enclosed leaf will lose its green colour
D
The leaves outside the flask serve as control
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28
A
light is necessary for photosynthesis
B
oxygen is necessary for photosynthesis
C
photosynthesis occurs in the leaves of plants
D
carbon (IV) oxide is necessary for photosynthesis
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29
When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a short period because
A
the tank was too small compare to the large ocean
B
the body cells of the fish swelled and burst as a result of the hypotonic fresh water
C
the body cells of the fish shrank as their sap was hypertonic to the fresh water
D
there was no food in the tank, so the starved.
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30
Which of the following pairs of organ is located in the anterior half of the mammalian body cavity?
A
Kidneys and lungs
B
Heart and ovary
C
Lungs and heart
D
Kidneys and heart
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