A sick baby was successfully transfused with blood from the father who has blood group AB.

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A blend of inherited and acquired characteristics shows

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A noticeable physical appearance of individuals of the same species is called

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Which of the following actions supports conservation?

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Which of the following natural resources cannot be conserved?

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The rational and prudent use of natural resources is known as

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A pandemic is an outbreak of disease that

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Overcrowding in a population does not result in

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Which of the following relationships does not involve two organisms?

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Special modification which enable an organism to survive in its habitat is known as.

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Food webs are complex because

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The direction wind is determined by

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