A bacterial species never uses oxygen as a final electron acceptor. However, it has the enzymes necessary to degrade toxic forms of oxygen. Such a bacterial species is an example of:

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An aerotolerant anaerobe is a bacterial species that does not use oxygen as a final electron acceptor, but it does have enzymes to degrade toxic forms of oxygen. However, unlike facultative anaerobes, it is not capable of using oxygen as an electron acceptor even if it is present in the environment.

A Bacterial Species Never Uses Oxygen as a Final Electron