The diseases caused by water-borne pathogens include

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An indigenous method of renewing and maintaining soil fertility is by

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The abiotic factors that control human population include

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The carrying capacity of a habitat is reached when the population growth begins to

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The most likely first colonizers of a bare rock are

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Which of the following animals can exist solely on the water they get from food and metabolic reactions?

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The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the

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Organisms living in an estuarine habitat are adapted to

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Plants of temperate origin can be grown in tropical areas in the vegetation zones of the

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The water cycle is maintained mainly by

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The autonomic nervous system consists of neurons that control the

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Plant growth can be artificially stimulated by the addition of

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