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Biology Past Questions and Answers

Waec Biology Questions

Question 416:

An association between two organisms in which both benefit is called

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A Parasitism
B Commensalism
C Symbiosis
D Predation
E Competition

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Question 417:

Which of the following is not an outcome of ecological succession?

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A There is a progressive change in species structure, organic matter and energy flow
B The climax stage consists of a comparatively long lasting species composition
C There is no dynamic equilibrium between the community and habitat in the climax stage
D Communities occurring later in the sequence of succession are more complex
E There are fewer dominant species in the late stages of succession.

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Question 418:

Which of the following is not an effect of over-crowding on a population?

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A Death
B Competition
C Commensation
D Aggression
E Cannibalism

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Question 419:

The diagram above represent the shape of major group of bacteria
The groups staphylococci and streptobacilli are represented by

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A I and II
B II and IV
C III and VII
D IV and VII
E IV and VIII

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Question 420:

Prevention of erosion could best be carried out by

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A Crop rotation and mulching
B Contouring of slopping ground and afforestation
C Grazing terracing and shifting cultivation
D Strip cropping and poaching
E Bush fallowing and crop rotation.

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