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

[EX Q]: Plankton is the most common life form in the ocean.
[EX A]: What is the most common life form in the ocean?

[EX Q]: Resonance is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule.
[EX A]: What is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule?

[EX Q]: Some gametophytes develop underground and form mycorrhizal associations with fungi.
[EX A]:
Some gametophytes develop underground and form mycorrhizal associations with what?