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

[Q]: Incubation is when birds keep their eggs warm while the embryos inside develop.
[A]: What is it called when birds keep their eggs warm while the embryos inside develop?


[Q]: The human eye detect can detect three colors of light.
[A]: How many colors of light can the human eye detect?


[Q]: Are vesicles larger or smaller than vacuoles?
[A]:
Are vesicles larger or smaller than vacuoles?