instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The cells in the follicle undergo physical changes and produce a structure called a corpus luteum.
answer:
The cells in the follicle undergo physical changes and produce a structure called a what?


question:
The active transport of ions across the membrane causes an electrical gradient to build up across the plasma membrane.
answer:
The active transport of ions across the membrane causes an electrical gradient to build up across the what?


question:
They move faster and move farther apart as they absorb heat happens to water molecules during the boiling process.
answer:

What happens to water molecules during the boiling process?