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

Ex Input:
Mesoderm type of cell layer do flatworms have.

Ex Output:
What type of cell layer do flatworms have?


Ex Input:
An allele that's always expressed over another is a dominant allele.

Ex Output:
What's the term for an allele that's always expressed over another?


Ex Input:
Primates have five digits on each extremity.

Ex Output:

How many digits do primates have on each extremity?