An anaerobic organism also called as anaerobe is an organism which does not require oxygen for its growth and may even lose its life in the presence of oxygen. There are three types of anaerobe: obligate anaerobe, which do not use oxygen for growth and even get harmed by it; aero tolerant organisms which cannot use oxygen for their growth but are able to sustain in its presence; and facultative anaerobes which can grow without the presence of oxygen and also can utilize its presence.
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