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

Ex Input:
Light retains its original color under water because frequency remains the same when light is refracted.

Ex Output:
Light retains its original color under water because what remains the same when light is refracted?


Ex Input:
Rod is the general shape of centrioles.

Ex Output:
What is the general shape of centrioles?


Ex Input:
Dense collagen secures together immovable joints and prevents them from moving.

Ex Output:
What secures together immovable joints and prevents them from moving?