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

[Q]: A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.
[A]: Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?


[Q]: Half-life property of carbon and other elements can be used to date fossils and rocks, among other things.
[A]: What property of carbon and other elements can be used to date fossils and rocks, among other things?


[Q]: A colloid is a homogeneous mixture with medium-sized particles.
[A]:
A colloid is a homogeneous mixture with medium-sized what?