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

[Q]: The cell starting meiosis is called a primary oocyte.
[A]: The cell starting meiosis is called a what?

[Q]: A vapor light produces visible light by electroluminescence process.
[A]: A vapor light produces visible light by what process?

[Q]: Amount of salt are aquatic biomes often classified.
[A]:
How are aquatic biomes often classified?