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Respiration can also occur under anaerobic conditions by processes called anaerobic respiration, in which the final electron acceptor is an inorganic molecule, such as nitrate (NO3−), nitrite (NO2−), sulfate (SO42−), or carbon dioxide (CO2). The energy yields available to the cell using these...
...for the black colour of marine sediments. Sulfur reenters the atmosphere naturally in three major ways: sea spray releases large amounts of the element from the ocean into the atmosphere; anaerobic respiration by sulfate-reducing bacteria causes the release of hydrogen sulfide (H2S) gas especially from marshes, tidal flats, and similar environments in which anaerobic...
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