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

[EX Q]: Once a plant cell becomes specialized, divide can they no longer do.
[EX A]: Once a plant cell becomes specialized, what can they no longer do?

[EX Q]: Process of desalinization helps provide cleaner water for agriculture.
[EX A]: Which process helps provide cleaner water for agriculture?

[EX Q]: Studies have shown that not only does reproduction have a cost as far as sperm long male fruit flies live, but also fruit flies that have already mated several times have limited amounts of this.
[EX A]:
Studies have shown that not only does reproduction have a cost as far as how long male fruit flies live, but also fruit flies that have already mated several times have limited amounts of this?