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

[EX Q]: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.
[EX A]: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?

[EX Q]: The opening in the front of the eye is called pupil.
[EX A]: What is the opening in the front of the eye called?

[EX Q]: Stilt like roots helps mangrove trees rise high above the water.
[EX A]:
Why do mangrove trees rise high above the water? which characteristic help them to do so?