2006 - WAEC Biology Past Questions and Answers - page 4

31
Study the following list of deficiency symptoms in animals; use it to answer the questions below
I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
V Failure of blood to clot; VI. Night blindness
Which of the following combination of food substances would correct the deficiency numbered II?
A
Tomatoes, oranges and mangoes
B
Yeast, liver and rice
C
Red palm oil, carrot and egg yolk
D
Green vegetables, butter and meat
correct option: d
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32
Which of the following food substances would produce a translucent mark when rubbed on a white paper?
A
Potato
B
Beans
C
Mango
D
Groundnut
correct option: d
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33
If an enzyme works best in an acid medium, in which of the following parts of the human gut is the pH best for
enzyme activities? In the
A
ileum, pH 9.0
B
stomach, pH 2.0
C
duodenum, pH 7.0
D
mouth cavity; pH 8.0
correct option: b
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34
Which of the following organisms is not considered as a parasitic plant?
A
Cassytha
B
Rhizopus
C
Dodder
D
Mistletoe
correct option: b
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35
The examples of autotrophic organisms include the following except
A
Euglena
B
Chlamydomonas
C
Hydra
D
Spirogyra
correct option: c
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36
Which of the following organisms feeds both autotrophically and heterotrophically?
A
Hydra
B
Paramecium
C
Mucor
D
Euglena
correct option: d
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37
Siphons and gills are structures in aquatic organisms used for
A
gaseous exchange
B
buoyancy
C
excretion
D
movement
correct option: a
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38
The first step in carrying out ecological studies in a terrestrial habitat is
A
quadrat sampling
B
mapping the area
C
collection of organisms
D
measuring abiotic factors
correct option: b
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39
Which of the following components of an ecosystem does not contribute to the biomass of the system?
A
Producers
B
Consumers
C
Micro-organisms
D
Habitat
correct option: d
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40
The group of several populations that interact and share a habitat, form
A
a species
B
a community
C
an ecotype
D
a tribe
correct option: b
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