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When did photosynthesis begin? a about 1.2 billion years ago b about 3 billion years ago Cabout 4.6 billion years ago d about 28 million years ago
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When did photosynthesis begin?

a about 1.2 billion years ago
b about 3 billion years ago
Cabout 4.6 billion years ago
d about 28 million years ago

When did photosynthesis begin? a about 1.2 billion years ago b about 3 billion years-example-1
User Evadeflow
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the answer here is b
User Maruta
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