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

[EX Q]: After fertilization, a zygote forms into two cells.
[EX A]: After fertilization, how many cells does a zygote form into?

[EX Q]: The long, threadlike extensions of the nerve cell help transmit nerve impulses.
[EX A]: Which part of the nerve cell helps transmit nerve impulses?

[EX Q]: Magnetic force force includes forces of attraction and repulsion.
[EX A]:
What force includes forces of attraction and repulsion?