When the photosynthetic organisms evolved the ability to split water, they produced _____ as a waste material, which was poisonous to most of the cells then alive.

Question

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When photosynthetic organisms evolved the ability to split water, they produced oxygen as a waste material. This oxygen was toxic to most of the cells then alive as they were anaerobic and were not adapted to survive in an oxygen-rich environment.

When the Photosynthetic Organisms Evolved the Ability to Split Water