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Oxygen was introduced into the atmosphere as a byproduct of a. respiration. c. dehydration. b. photosynthesis. d. osmosis.
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Which muscle cell structure stores calcium ions that are used to trigger the contraction?
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Organic molecules are sometimes found within meteorites that crash into earth. which meteorite characteristic is similar to what most likely was present on early earth?
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What are the functions of lipids or fat have in the human body?
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Oxygen was introduced into the atmosphere as a byproduct of a. respiration. c. dehydration. b. photo...
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