About how many years ago did photosynthesis begin in the ocean?

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A2000-3000 Million year

B2500 -3000 Million year

C2000-3500 Million year

D2500-3500 Million year

Answer:

Photosynthesis began in the ocean about 2500-3000 million years ago
Photosynthesis is the process by which plants take in carbon dioxide and release oxygen

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The Repette discontinuity is the part that separates the upper mantle from the lower mantle
The Lehmann discontinuity is the part that separates the outer core from the inner core
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