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

[Q]: Sexual reproduction, in general, relies on sets of cells that are precursors for eggs and sperm.
[A]: What kind of reproduction, in general, relies on sets of cells that are precursors for eggs and sperm?


[Q]: The height of the wave is used to determine the magnitude of an earthquake.
[A]: What measurement of the wave is used to determine the magnitude of an earthquake?


[Q]: Microscopes were first developed in the early 1600s by eyeglass makers.
[A]:
Microscopes were first developed in the early 1600s by this trade?