Biology, 03.12.2021 22:00 mjakabeast24

21. (01.03 MC) How did cells survive on early Earth without oxygen? (5 points) O They used anaerobic respiration. They used aerobic respiration. They were scarce enough that they did not need oxygen. They used oxygen in the ocean water.

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21. (01.03 MC) How did cells survive on early Earth without oxygen? (5 points) O They used anaerobic...

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