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

Thermoregulation is the process when animals maintain an internal temperature.
What is the process when animals maintain an internal temperature?

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

You call an animal in which the embryo, often termed a joey, is born immature and must complete its development outside the mother's body a(n) marsupial.

What do you call an animal in which the embryo, often termed a joey, is born immature and must complete its development outside the mother's body?