Question

what is a microaerophile?
o a bacterium that can use oxygen if present but prefers anaerobic mechanisms of metabolism
o an aerobic bacterium that requires oxygen at a concentration less than that in the atmosphere
o a bacterium that requires carbon dioxide in higher levels than the atmosphere
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Explanation:

A microaerophile is defined as a bacterium that can use oxygen if present but prefers anaerobic mechanisms of metabolism. This is a key concept in microbiology related to bacterial respiration and environmental requirements.

Answer:

a bacterium that can use oxygen if present but prefers anaerobic mechanisms of metabolism