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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Organisms that are damaged by normal atmospheric levels of oxygen but require oxygen for growth in lower levels (2-10%) are called microaerophiles. Facultative anaerobes can grow in the presence or absence of oxygen, whereas aerotolerant organisms can tolerate the presence of oxygen but do not use it for growth or metabolism. Anoxygenic organisms do not use oxygen for metabolism.

Organisms That Are Damaged by the Normal Atmospheric Levels of Oxygen