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

[EX Q]: Neutrophils provide an early, rapid, and nonspecific defense against invading pathogens.
[EX A]: What provides an early, rapid, and nonspecific defense against invading pathogens?

[EX Q]: Although they differ vastly in hardness, pencil lead and diamonds both contain carbon.
[EX A]: Although they differ vastly in hardness, pencil lead and diamonds both contain what element?

[EX Q]: Most growing plant cells expand through water uptake.
[EX A]:
How do most growing plant cells expand?