instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Lying with their mouths open, a behavior called gaping, probably serves the function of cooling down for crocodiles.
answer:
Lying with their mouths open, a behavior called gaping, probably serves what function for crocodiles?


question:
Mercury is not a solid even at room temperature.
answer:
Which metal is not a solid even at room temperature?


question:
The long, threadlike extensions of the nerve cell help transmit nerve impulses.
answer:

Which part of the nerve cell helps transmit nerve impulses?