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

Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.
Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?

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

Cellulose is created by the polymerization of glucose.
What is created by the polymerization of glucose?