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

Example Input: A concave lens is thicker at the edges than it is in the middle.
Example Output: What type of lens is thicker at the edges than it is in the middle?

Example Input: One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.
Example Output: Which of the following is true regarding the properties of an air mass?

Example Input: The diversity of alleles and genotypes within a population is known as genetic variance.
Example Output:
The diversity of alleles and genotypes within a population is known as genetic what?