explain about Oxygen cycle
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The Oxygen cycle is the biogeochemical cycle that describes the movement of oxygen within and between its three main reservoirs: the atmosphere (air), the total content of biological matter within the biosphere (the global sum of all ecosystems), and the lithosphere (Earth's crust).
shreyas8472:
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atmospheric oxygen enters the living organisms, as a gas required in respiration. During this process carbon dioxide and water are formed.
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