Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Amount of salt are aquatic biomes often classified.

A: How are aquatic biomes often classified?
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Q: The behavior of ideal gases is explained by kinetic molecular theory.

A: The behavior of ideal gases is explained by what theory of gases?
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Q: A hookworm is classified as a parasite.

A:
A hookworm is classified as what type of organism?
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