instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the specimen.
answer:
While the numerical aperture can be used to compare resolutions of various objectives, it does not indicate how far the lens could be from the what?

question:
The female reproductive system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus.
answer:
What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus?

question:
Gap genes controls the shape of a developing zygote early in its development.
answer:
What controls the shape of a developing zygote early in its development?