What is the difference between an obligate aerobe, and obligate anaerobe, and a facultative anaerobe? Which kind of organism is yeast?

Answer and Explanation:

Obligate aerobe are organisms that can only survive in presence of oxygen and are poisoned by the absence of oxygen.

Obligate anaerobes are organisms that can only survive in absence of oxygen and are poisoned by the presence of oxygen. e. g., bacteria of the genus Clostridium.

Facultative anaerobes are organisms that respire anaerobically in absence of oxygen and aerobically in the presence of oxygen, e. g., yeast.