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

Ex Input:
Sexual reproduction, in general, relies on sets of cells that are precursors for eggs and sperm.

Ex Output:
What kind of reproduction, in general, relies on sets of cells that are precursors for eggs and sperm?


Ex Input:
Rubber is an example of a(n) insulators that does not allow electrons to move through them.

Ex Output:
Rubber is an example of what type of substances that do not allow electrons to move through them?


Ex Input:
Variation in muscle cells gives further insight into some benefits of anaerobic type of respiration.

Ex Output:
Variation in muscle cells gives further insight into some benefits of what type of respiration?