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

Input: Consider Input: The sun delivers power to the chemical factory chloroplasts.

Output: What delivers power to the chemical factory chloroplasts?


Input: Consider Input: When a sperm penetrates the egg, it triggers the egg to complete meiosis.

Output: When a sperm penetrates the egg, it triggers the egg to complete what?


Input: Consider Input: Fractional crystallization is the separation of compounds on the basis of their solubilities in a given solvent.
Output: What is the separation of compounds on the basis of their solubilities in a given solvent?