sashasenaki sashasenaki

19-07-2020
Biology

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The oldest known fossil belongs to the cyanobacteria. How did this fossil help to alter the atmosphere of ancient Earth's oxygen levels?

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alaniscruzxx alaniscruzxx

21-07-2020

Cyanobacteria are autotrophic and perform photosynthesis. Photosynthetic organism produce oxygen in the exchange for Carbon Dioxide. Cyanobacteria caused oxygen levels to rise in Earths atmosphere.

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