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

[Q]: Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.
[A]: Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?


[Q]: The long bone work as lever.
[A]: What type of function does the long bone perform?


[Q]: You call sound that has a wave frequency higher than the human ear can detect ultrasound.
[A]:
What do you call sound that has a wave frequency higher than the human ear can detect?