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:
Circannual behavioral rhythms are linked to the yearly cycle of seasons.
answer:
What type of behavioral rhythms are linked to the yearly cycle of seasons?


question:
A complex machine is described by: it is made of more than one simple machine.
answer:
Which of the following statements best describes a complex machine?