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The atmospheric concentration of carbon dioxide on earth has been regulated by the concentration of what form of life?

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In genetic drift, chance fluctuations in allele frequencies over generations tend to reduce what?

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What type of acid is an organic compound that is built of small units called nucleotides?

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What is the term for the process of turning sunlight’s energy into food?

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Name one unit used to measure pressure.

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Each hydrogen atom follows the octet rule with how many pairs of electrons?

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What is the term for when deep ocean water rises to the surface?

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The cephalic phase (reflex phase) of gastric secretion, which is relatively brief, takes place before food enters where?

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What occurs whenever an unbalanced force acts on an object?

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Parasitic chelicerates like ticks and mites have evolved what?

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