What role do plants, cyanobacteria, animals, bacteria play in the oxygen cycle? How is oxygen used by these organisms?

1) plants and cyanobacteria (autotrophs) release oxygen during photosynthesis in the process of water photolysis; 2) animals, plants, fungi, bacteria (aerobes) use oxygen in the process of respiration; 3) oxygen is used in cells for the oxidation of organic substances, participating in the formation of water molecules.

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