Over geological time, photosynthetic carbon
fixation in the oceans has exceeded the respiratory oxidation of organic carbon.
This was the reason for

Question

Answer

the simultaneous accumulation of CO 2 
in the atmosphere and burial of the organic carbon in the marine sediments.

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the simultaneous accumulation of Oxygen and CO 2 
in the atmosphere and final burial of organic carbon in the marine sediments.

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the simultaneous accumulation of Oxygen in the
atmosphere, draw down of CO 2  from the atmosphere and final burial of
organic carbon in the marine sediments.

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the simultaneous accumulation of Nitrogen and Oxygen
in the atmosphere and draw down of CO 2  from the atmosphere to the
oceans.

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Over geological time, photosynthetic carbon fixation in the oceans has exceeded ...

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