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

Together, the muscular and skeletal organs are known as the musculoskeletal system.
Together, the muscular and skeletal organs are known as what?

Darwin believed in gradualism.
Did darwin believe in punctuated equilibrium or gradualism?

The cells of all protists have a nucleus.

The cells of all protists have a what?