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Procedure in pregnancy to have access to fetus. what do you call this procedure?
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Sarah performs an experiment to determine the effect of nitrogen on plants. she studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation. which factor is an independent variable?
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Awoman with type a blood has a child with type a blood. which of the following men could not be the father of this child? their blood types are below. a. b b. any of these could be the father c. ab d. a
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Below are mechanisms for organisms to evolve except for ?...
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