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

[EX Q]: Pheromones enable communication, which is vital for organisms like ants that live in a large community.
[EX A]: Pheromones enable what, which is vital for organisms like ants that live in a large community?

[EX Q]: Pleiotropic effects causes symptoms associated with sickle-cell disease.
[EX A]: What causes symptoms associated with sickle-cell disease?

[EX Q]: The lens of the eye is a(n) convex shape.
[EX A]:
What shape is the lens of the eye?