Why did cyanobacteria gain an advantage over their chemosynthetic competitors

Hi there ,

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.

i hope this helps you

Have a great afternoon

FaithRawlins14