Anaerobic organism

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Spinoloricus nov. sp., a metazoan that metabolises wi hydrogen, lackin mitochondria an instead uisin hydrogenosomes.

An anaerobic organism or anaerobe is ony organism that daes nae require oxygen for growth. It mey react negatively or even dee if oxygen is present. (In contrast, an aerobic organism (aerobe) is an organism that can survive an grow in an oxygenated environment.)