leslieh
How did photosynthesis evolve?
Photosynthesis
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swartzy
Replied to: How did photosynthesis evolve?
Photosynthesis evolved when the only life on Earth were microorganisms.
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cyclotreker
Replied to: Photosynthesis evolved when the only life on Earth were microorganisms.
The first photosynthetic organisms probably appeared about 3500 million years ago.
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epking
Replied to: The first photosynthetic organisms probably appeared about 3500 million...
Cyanobacteria appeared about 3000 million years ago, and began to oxygenate the atmosphere.