instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.
answer:
Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?

question:
One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.
answer:
Which of the following is true regarding the properties of an air mass?

question:
Isomers are compounds with the same number of carbon and hydrogen atoms called.
answer:
What are compounds with the same number of carbon and hydrogen atoms called?