Photosynthetic bacteria evolved on earth abou | vedclass

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(b)Because in the Archeozoic era or $3000$ to $3300$ million years ago, these bacteria were present. Fossils of Cyanobacterium and photosynthetic bact

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$3000$ to $ 3300$

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(b)Because in the Archeozoic era or $3000$ to $3300$ million years ago, these bacteria were present. Fossils of Cyanobacterium and photosynthetic bacteria have been found which are $3000$ million years old.

Photosynthetic bacteria evolved on earth about ....... million years ago

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