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Why do you think scientists think the first organisms did not need oxygen to survive?
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Jan 21, 2015
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Why do you think scientists think the first organisms did not need oxygen to survive?
Biology
middle-school
Tsakoyan
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Nitrogen and Hydrogen were more prevalent in Earth's early stages of "life" and a lot of organisms live under water.
Igor Maznitsa
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Jan 26, 2015
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Igor Maznitsa
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