1998 - WAEC Biology Past Questions and Answers - page 4
31
Which of the following is a feature of wind pollinated flowers?
A
Large and brightly coloured petals
B
Possession of sweet scent
C
Presence of nectar
D
Presence of pollen guides
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32
In testing for starch in a leaf the function of alcohol is to
A
kill the cells of the leaf
B
soften the veins of the leaf
C
aid iodine to penetrate the cells
D
be a component of the heating bath
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33
Which of the following processes removes CO2 from the atmosphere?
A
Respiration
B
Photosynthesis
C
Transpiration
D
Excretion
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34
The role of bacteria in the nitrogen cycle includes the following except
A
fixing atmospheric nitrogen
B
converting ammonia to nitrites
C
converting nitrites to nitrates
D
converting carbohydrates to carbondioxide
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35
The mode of nutrition which describes feeding habit in animals is
A
autotrophic
B
holozoic
C
holophytic
D
saprophytic
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36
Which of the following organisms has homodont dentition?
A
Rabbit
B
Man
C
Sheep
D
Cat
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37
The pancreatic duct opens into the
A
caecum
B
colon
C
ileum
D
duodenum
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38
The enzyme that acts on milk in the stomach is
A
invertase
B
trypsin
C
diastase
D
renin
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39
Which of the following plants is a carnivore?
A
Desmodium
B
Sundew
C
Mushroom
D
Platycerium
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40
Hydra feeds by
A
digesting its food extra cellularly
B
absorbing food digested by other organisms
C
symbiotic association
D
masticating the food particles
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