facultative anaerobic organism

A. xylanus is a facultative anaerobic organism which can grow in several different environments.

Oxygen is toxic to organisms that are obligate anaerobes, and are not required by facultative anaerobic organisms.

It is a facultative anaerobic organism and considered an extremophile due to its optimal growing conditions at 8ᵒC and 30 MPa.

Enterococci are facultative anaerobic organisms, i.e., they are capable of cellular respiration in both oxygen-rich and oxygen-poor environments.

The spore-forming bacteria can again be divided based on their respiration: 'Bacillus' is a Facultative anaerobic organism, while 'Clostridium' is an obligate anaerobe.

A facultative anaerobic organism is an organism, usually a bacterium, that makes ATP by aerobic respiration if oxygen is present but is also capable of switching to fermentation.

If oxygen is present in the cell, many organisms will bypass fermentation and undergo cellular respiration; however, facultative anaerobic organisms will both ferment and undergo respiration in the presence of oxygen.