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pychu [463]
3 years ago
10

I need help.... Cyanobacteria formed colonies called stromatolites. These used to be plentiful. What role did they contribute to

the atmosphere?
Biology
1 answer:
frutty [35]3 years ago
5 0
Answer - Cyanobacteria aka Algae that contributed in creating O2 for the atmosphere as a byproduct thru Photosynthetic.

Reason - Of course Algae make up mainly the whole world in waters and they do photosynthesis to give off oxygen in the atmosphere.
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