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

Ex Input:
Producing sperm and secreting testosterone are the main functions of male reproductive system system.

Ex Output:
Producing sperm and secreting testosterone are the main functions of what system?

Ex Input:
Are humans a new or old species on the earth?

Ex Output:
Are humans a new or old species on the earth?

Ex Input:
The cell starting meiosis is called a primary oocyte.

Ex Output:
The cell starting meiosis is called a what?