Another name for a fertilized egg is a

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Which of the following is not a pest of crops?

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Snails belong to the phylum

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The basic functional unit of the kidney is the

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The following exist as free-living organisms except

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The process by which organisms keep their internal condition relatively stable is called

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Behaviour conditioning was described by

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Which of these is not detected by the nerve endings of the skin?

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An association between bacteria and root nodules of legume is called

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Which of the following is NOT a waste product of plants?

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Which of the following statements is not true of a fish?

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Hormones that help regulate blood calcium levels are produced by the

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