Given a scientific question, generate a correct answer to it.

Input: Consider Input: The regions of a material where the north and south poles of atoms are aligned are called what?

Output: magnetic domains

Input: Consider Input: Skeletal muscle cells and cardiac muscle cells share what property, which is not shared by smooth muscle cells?

Output: striations

Input: Consider Input: Water is a polar compound, so its molecules are attracted to each other and form what kind of bonds?
Output: hydrogen