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How did the first photosynthetic organisms help turn Earth's early environment from anaerobic to aerobic​

1 Answer

7 votes

Answer:

Two and a half billion years ago, single-celled organisms called cyanobacteria harnessed sunlight to split water molecules, producing energy to power their cells and releasing oxygen into an atmosphere that had previously had none.

Step-by-step explanation:

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User Dentemm
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