1994 - WAEC Biology Past Questions and Answers - page 3

21
Which of the following represents the correct order in a possible food chain?
A
Crustacean -> diatom -> fish -> man
B
Fish -> crustacean -> man -> diatom
C
Man -> fish -> crustacean -> diatom
D
Diatom -> crustacean -> fish -> man
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22
Which of the following relationships illustrates competition?
A
Cattle egret moving along with cattle
B
Goats and cows grazing on a small grass lawn
C
Mosses succeeding lichens in a rocky terrain
D
Red mangrove swamp dying and replaced by white mangrove
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23
Which of the following agents is responsible for the dispersal of the seed shown above?
A
man
B
Water
C
Wind
D
Explosive mechanism
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24
The structure used by fishes to detect the presence and movement of other animals
by the vibration they produce is the
A
eye
B
nostril
C
lateral line
D
scales
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25
Muscles are attached to bones by means of
A
ligament
B
cartilage
C
capillaries
D
tendons
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26
The ability of the eye to alter the focal length of the lens, with regard to the distance of the object from
the eye is known as
A
binocular vision
B
nocturnal vision
C
distortion
D
accommodation
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27
What is the fate of the ovary of a flower after fertilization?
A
becomes the seed
B
withers away
C
becomes the fruit
D
develops more nuclei
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28
The diagrams above represent a group of insects known to be
A
colonial
B
parasitic
C
soldier
D
carnivorous
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29

In their system of organisation, the diagram labelled II plays the role of a

A
worker
B
soldier
C
queen
D
drone
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30
Which of the following determines a normal male offspring?
A
X
B
Y
C
XX
D
XY
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