Anaerobic beings and facultative anaerobic beings

Write down the differentiation between obligate anaerobic beings and facultative anaerobic beings?

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The Facultative anaerobic beings, for example, fungi Saccharomyces cerevisiae, brewing yeast, can stay alive under oxygen-absent environments and atmosphere performing fermentation. But when oxygen is accessible these beings perform aerobic respiration.

The Obligate anaerobic beings are those which can’t stay alive when oxygen is present. Some fungi, or as well some bacteria (for example, agent of botulism Clostridium botulinum, and agent of tetanus, Clostridium tetani) and some protozoans are instances of obligate anaerobes.

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