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

Ex Input:
The long, threadlike extensions of the nerve cell help transmit nerve impulses.

Ex Output:
Which part of the nerve cell helps transmit nerve impulses?


Ex Input:
Pleiotropic effects causes symptoms associated with sickle-cell disease.

Ex Output:
What causes symptoms associated with sickle-cell disease?


Ex Input:
Mountain building and earthquakes are some of the responses of rocks when subected to stress.

Ex Output:

Mountain building and earthquakes are some of the responses of rocks when subected to what?