Organisms that are damaged by the normal atmospheric levels of oxygen (20%)but require oxygen at levels of 2-10% for growth are called

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Microaerophiles are organisms that require low levels of oxygen for growth, typically between 2-10%, but are damaged by normal atmospheric levels of oxygen (20%). Facultative anaerobes can grow in the presence or absence of oxygen, while aerotolerant organisms can grow in the presence of oxygen but do not use it for metabolism. Anoxygenic organisms do not use oxygen at all for their metabolic processes.

Organisms That Are Damaged by the Normal Atmospheric Levels of Oxygen