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Jbafford · Answer 1 · 2017-11-07T17:33:48+0000

the process by which oxygenreleased into the atmosphere by photosynthetic organisms is taken up by aerobic organisms while the carbon dioxide released as a by-product of repiration is taken up for photosynthesis. Origin ofoxygen cycle Expand.

Larron · Answer 2 · 2017-11-13T03:37:29+0000

The oxygen cycle is the biogeochemical cycle ofoxygen within its three main reservoirs: the atmosphere (air), the total content of biological matter within the biosphere (the global sum of all ecosystems), and the Earth's crust.

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