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Today at 11:58 AM
Biology

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Oxygen levels first rose in the atmosphere because of _____.

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Аноним Аноним

Today at 12:03 PM

cyanobacteria due to their use of photosynthesis.

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penfila11Pen penfila11Pen

Today at 12:03 PM

Cyanobacteria.
These bacterias gain their energy through photosynthesis.

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