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

Example Input: The bird ancestor that lived in trees developed wings, which is commonly associated with birds.
Example Output: The bird ancestor that lived in trees developed what feature commonly associated with birds?

Example Input: Volvox sphere has a distinct front and back end.
Example Output: What has a distinct front and back end?

Example Input: Iconic compounds have a net neutral charge.
Example Output:
What kind of charge do iconic compounds have?