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

[EX Q]: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of large intestine.
[EX A]: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of what?

[EX Q]: Comparing genome sequences provides clues to evolution and development.
[EX A]: Comparing what sequences provides clues to evolution and development?

[EX Q]: Food chewed evenly during mastication moisten and lubricate the lining of the mouth and this?
[EX A]:
Food chewed evenly during mastication moisten and lubricate the lining of the mouth and this?