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

Q: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.

A: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?
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Q: A change of season and less food usually cause certain animals to migrate.

A: Which two environmental changes usually cause certain animals to migrate?
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Q: Tides is the term for when the water of the ocean slowly rises and falls.

A:
What is the term for when the water of the ocean slowly rises and falls?
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