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

Q: Some gametophytes develop underground and form mycorrhizal associations with fungi.

A: Some gametophytes develop underground and form mycorrhizal associations with what?
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Q: For to synthesize glycogen purpose does liver use the excess carbohydrate.

A: For what purpose does liver use the excess carbohydrate?
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Q: The prostate gland secretes a fluid that mixes with sperm to help form semen.

A:
The prostate gland secretes a fluid that mixes with sperm to help form what?
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