Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Some gametophytes develop underground and form mycorrhizal associations with fungi.

Answer: Some gametophytes develop underground and form mycorrhizal associations with what?


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: The first leaves of most ferns appear curled up into fiddleheads.

Answer:
The first leaves of most ferns appear curled up into what?