Allergic To Oxygen

Correct Answer: D. Obligate Anaerobes

The term obligate means that this is a required condition that has to be met to ensure the viability of the organism. An obligate aerobe has to have oxygen present to be able to survive, like humans. Likewise, an organism that cannot live in the presence of oxygen would be an obligate anaerobe. Facultative anaerobes can survive in the presence of oxygen, but prefer aerobic environments. Permissive anaerobe is a term that does not exist in biology. Aerotolerant organisms do not require oxygen, but they are not poisoned by it either.

1. Obligate aerobes need oxygen to survive because they rely on aerobic respiration.
2. Obligate anaerobes cannot survive with oxygen.
3. Facultative anaerobes grow with or without oxygen, but prefer oxygen environments because they can generate more ATP through aerobic respiration.
4. Microaerophiles need oxygen to survive, but they are poisoned by high concentrations of oxygen.
5. Aerotolerant organisms do not require oxygen, but they are not poisoned by it either.
Source from Wikipedia

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