The structure labelled 4 is for

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Nitrogen- fixing micro-organisms in leguminous plants live symbiotically in the

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Fertilizers are lost from the soil through

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Sources of air pollutants are

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Which of the following diseases can be prevented by innoculation?

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Which of these is NOT an adaptive features for arboreal life?

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Which of the following is likely to occur in a deciduous forest during the dry season?

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The above diagram represents a competitive interaction between organism in communities I and II. Which of the following statements is CORRECT?

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A food web is more stable than a food chain because

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Organisms in an ecosystem are usually grouped according to their trophic level as

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The most important factors which influence an organism’s way of life in its habitat are

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Which of the following characters is NOT sex-linked?

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