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

Example Input: Diffusion process helps absorptive protists absorb food molecules across their cell membranes.
Example Output: Which process helps absorptive protists absorb food molecules across their cell membranes?

Example Input: Elements are pure substances that make up all matter.
Example Output: Elements are pure substances that make up what?

Example Input: One large eggs are generated during oogenesis.
Example Output:
How many large eggs are generated during oogenesis?