Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Amount of salt are aquatic biomes often classified.

Answer: How are aquatic biomes often classified?


Question: In prokaryotes, a(n) genome is composed of a single, double-stranded dna molecule in the form of a loop or circle.

Answer: In prokaryotes, what is composed of a single, double-stranded dna molecule in the form of a loop or circle?


Question: All cells undergo cell division during a lifetime, but when this process is out of control, cancer results.

Answer:
All cells undergo what during a lifetime, but when this process is out of control, cancer results?