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Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere. True False
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Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere.

True
False

User Steven Williams
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false, they were not Toxic was actually poinsonous to the Anaerobic photoautotrophs. However cyanobacteria (a.k.a pondscum) is believed to be the first bacteria to give off oxygen as a by-product of photosynthetic processes.
User Yeah Its Me
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