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: Seismic waves prove the inner core it is solid.

A: What do seismic waves prove about the inner core?
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Q: In multicellular organisms, only mutations in cell lines that produce gametes can be passed to offspring.

A:
In multicellular organisms, only mutations in cell lines that produce gametes can be passed to what?
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