An organism that does not require oxygen is called a what?

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Multiple Choice

An organism that does not require oxygen is called a what?

Explanation:
An organism that does not require oxygen fits the term anaerobe. These microbes rely on energy-producing pathways that don’t use oxygen, such as fermentation or anaerobic respiration with alternative electron acceptors like nitrate or sulfate. Some anaerobes are harmed by oxygen because they lack protective enzymes to detoxify reactive oxygen species, so oxygen can be toxic to them. In contrast, an aerobe needs oxygen to grow, a facultative anaerobe can grow with or without oxygen, and a microaerophile requires only small amounts of oxygen.

An organism that does not require oxygen fits the term anaerobe. These microbes rely on energy-producing pathways that don’t use oxygen, such as fermentation or anaerobic respiration with alternative electron acceptors like nitrate or sulfate. Some anaerobes are harmed by oxygen because they lack protective enzymes to detoxify reactive oxygen species, so oxygen can be toxic to them. In contrast, an aerobe needs oxygen to grow, a facultative anaerobe can grow with or without oxygen, and a microaerophile requires only small amounts of oxygen.

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