Why did cyanobacteria gain an advantage over their chemosynthetic competitors

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your answer to this response is :

The proliferation of photosynthetic organisms in the fossil record suggests that the ability to perform photosynthesis was a great advantage, because sunlight, water, and carbon dioxide were abundant and easy to obtain. The oxidizing atmosphere was toxic to many organisms.

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FaithRawlins14

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

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