instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Cells are the  basic building blocks of the human body.
answer:
What are the  basic building blocks of the human body?


question:
Plasma membranes encloses and defines the borders of cells.
answer:
What encloses and defines the borders of cells?


question:
Ocean waves travel(s) at the interface between the sea surface and the atmosphere.
answer:

What travels at the interface between the sea surface and the atmosphere?