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Biology Past Questions and Answers

Waec Biology Questions

Question 226:

A climax community is characterised by

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A A stable composition of plant and animal species
B Rapid changes in the composition of species
C Constant changes in appearance of the habitat
D Different species occurring at different times
E Gradual change in animal population

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Question 227:

Which of the following is not a characteristic of overcrowding in plant and animal community?

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A Population outstripping available space
B Population exceeding available food
C Competition within the population
D Increase in primary production
E Population increasing at the same rate as the bith rate

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Question 228:

The use of predators or parasites to control pests in the farm is known as

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A Predator control
B Chemical control
C Biological control
D Animal control
E Parasitic control

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Question 229:

Which of the following substances cannot control the growth of harmful microoganisms?

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A Antibiotics
B Hypertonic salt solution
C Disinfectants
D Isotonic sugar solution
E Antiseptics

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Question 230:

Which of the following is the underling principle in the adoption of biological control of pests?

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A Knowledge of agricultural practices by the farmer
B Relationship between plants and animals
C The presence of poisonous chemicals in the farm
D The relative population of plants and animals in the farm
E The predator-prey relationship in the ecological community

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