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OpenStudy (cathyangs):
When did the first photosynthetic life appear on earth? When did the first photosynthetic organisms appear?
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OpenStudy (anonymous):
I wasn't there. But scientists found stromatolithes from 3.2 billion years ago that contain photosynthetic organisms. this, and the upcoming of slate in australia, are strong evidence for photosynthetic organisms.
OpenStudy (geometry_hater):
Photosynthetic life started appearing roughly about 3 billions years ago when Earth's oxygen started to appear. But its really just an estimation
OpenStudy (cathyangs):
Thanks! :D
OpenStudy (anonymous):
photosynthesis occurs first in eubacteria and first aerobic photosynthesis in which oxygen evolved is occur in cyanobacteria
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