2006 - WAEC Biology Past Questions and Answers - page 5
41
The physical and chemical factors which affect the life of organisms in an environment are described as
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Which of these factors are common to both aquatic and terrestrial habitats?
A
Light, rainfall and turbidity
B
Light, temperature and tide
C
Light, rainfall and temperature
D
Rainfall, turbidity and salinity
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Organisms that feed essentially on plants within any ecosystem may be referred to as
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Which of the following statements about feeding relationships is correct?
A
In a food web on land, grasshopper feeds on praying mantis and on predator bugs
B
In a food chain on land, green plant is the producer
C
In an aquatic food chain mollusc larvae are the producers
D
In an aquatic food web, various copepods feed on mollusk Larvae and on sand eel
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Which of these diseases cannot be spread by an insect?
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Air pollution can be reduced by the following methods except
A
building tall factory chimneys
B
passing waste gases through filters and absorbers
C
using lead-free petrol in car
D
recycling tins, cans and bottles
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An effective management of natural resources to ensure their continued yield from generation to generation may involve all the following except
B
prevention of habitat destruction
C
biological control of pests
D
disposal of raw sewage into the sea
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Which of the following orders correctly represents the trend in eutrophication?
A
Lack of oxygen → Death of aquatic organisms → Massive algal growth
B
Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
C
Heavy mineralization → Lack of oxygen → Massive algal growth
D
Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms
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The following practices can contribute towards the conservation of natural resources except
D
establishment of Game Reserves
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Variation is a factor which
A
differentiates between individuals of the same species
B
qualifies an organism to live with others
C
enables organisms to adapt to the environment
D
states the external features of an organism
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