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Biology, 05.02.2021 20:10 candaceblanton

One theory of early life on Earth states that the first life forms did not use oxygen for respiration and were unable to make their own food. Based on this theory, which types of organisms were most likely present? * A. aerobic, autotrophic bacteria
B. anaerobic, autotrophic bacteria
C. aerobic, heterotrophic bacteria
D. anaerobic, heterotrophic bacteria

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