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What refers to the union of a male and female of the same species for reproduction?
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What refers to the development and nourishment of an embryo within the mother’s body but not inside an egg?
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What refers to a substance made from two or more elements joined by chemical bonds?
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What refers to a group of individual organisms of the same species that live closely together?
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What reduces the need for pesticides and other toxic chemicals?
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What receives blood in the heart?
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What reaction means, literally, “splitting with water"?
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What reaction is considered the reverse of photosynthesis?
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What radiation, generally produced by thermal motion and the vibration and rotation of atoms and molecules, literally means "below red"?
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270
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What purpose does the appendix serve in humans today?
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What pulls skydivers towards the earth?
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390
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What provides the shape of a cell?
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What provides building materials for the body?
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What provides an early, rapid, and nonspecific defense against invading pathogens?
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What proteins synthesized in cells act as catalysts?
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What proteins span the entire plasma membrane?
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What protects the scalp from ultraviolet light exposure and loss of body heat?
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