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

[EX Q]: Chewing insects such as dragonflies and grasshoppers have two many sets of jaws.
[EX A]: Chewing insects such as dragonflies and grasshoppers have how many sets of jaws?

[EX Q]: A pregnant woman should avoid toxic substances while pregnant.
[EX A]: What should a pregnant woman avoid while pregnant?

[EX Q]: Diffusion process helps absorptive protists absorb food molecules across their cell membranes.
[EX A]:
Which process helps absorptive protists absorb food molecules across their cell membranes?