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

Q: The long bone work as lever.

A: What type of function does the long bone perform?
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Q: Filter feeders called rotifers collect digestive and excretory wastes in cloacal bladder primitive organ.

A: Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?
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Q: A(n) an ionic bond forms when the metal sodium gives up an electron to the nonmetal chlorine.

A:
What forms when the metal sodium gives up an electron to the nonmetal chlorine?
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