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

[Q]: Fermat’s principle states that light will always take the path of the least amount of time.
[A]: Fermat’s principle states that light will always take the path of least amount of?


[Q]: In prokaryotes, a(n) genome is composed of a single, double-stranded dna molecule in the form of a loop or circle.
[A]: In prokaryotes, what is composed of a single, double-stranded dna molecule in the form of a loop or circle?


[Q]: A(n) beneficial relationship exists when a certain type of tree’s roots need a fungus present in order to grow normally.
[A]:
Which type of relationship exists when a certain type of tree’s roots need a fungus present in order to grow normally?