instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
As a myotube is formed from many different myoblast cells, it contains many nuclei, but has a continuous cytoplasm.
answer:
As a myotube is formed from many different myoblast cells, it contains many nuclei, but has a continuous what?


question:
If an air mass forms over an ocean it is called a maritime air mass.
answer:
If an air mass forms over an ocean it is called what type of air mass?


question:
Dark matter is the area of our universe that isn't stars and galaxies called.
answer:

What is the area of our universe that isn't stars and galaxies called?