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

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

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


Input: Consider Input: Cells are small biological structures that make up all living things, including the human body.

Output: What small biological structures make up all living things, including the human body?


Input: Consider Input: Gap genes is the term for genes that control the expression of other genes within specific regions of cells in the developing organism.
Output: What is the term for genes that control the expression of other genes within specific regions of cells in the developing organism?