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(C) The evolution of oxygen-producing photosynthetic bacteria,specifically cyanobacteria,is a significant event in the history of life on Earth.These

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$3500-3800$ million years ago

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(C) The evolution of oxygen-producing photosynthetic bacteria,specifically cyanobacteria,is a significant event in the history of life on Earth.These organisms are believed to have evolved approximately $3500-3800$ million years ago.Their activity led to the oxygenation of the Earth's atmosphere,which paved the way for the evolution of aerobic life forms.

Photosynthetic bacteria that produce oxygen are believed to have evolved approximately how many years ago?

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