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

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

Example Input: If an air mass forms over an ocean it is called a maritime air mass.
Example Output: If an air mass forms over an ocean it is called what type of air mass?

Example Input: Nonvascular plants were the first plants to evolve.
Example Output:
What were the first plants to evolve?