Question

multiple choice question
when a culture holds two or more identified, easily differentiated species of microbes, that culture is ______.

○ mixed
○ axenic
○ contaminated
○ differential

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Explanation:

• An axenic culture has only one species, so it's not the answer.
• A contaminated culture has unwanted microbes (not just identified, differentiated ones), so it's incorrect.
• A differential culture is for distinguishing microbes, not about having multiple identified species.
• A mixed culture contains two or more identified, easily differentiated species of microbes, which matches the description.

Answer:

A. mixed