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

Input: Consider Input: The cytoskeleton holds cell organelles in place within the cytoplasm.

Output: What part of the cell holds cell organelles in place within the cytoplasm?

Input: Consider Input: Volvox sphere has a distinct front and back end.

Output: What has a distinct front and back end?

Input: Consider Input: Mammals may either be herbivores, omnivores or herbivores.
Output: Mammals may either be herbivores, omnivores or what else?