Vary in the number of neutrons but Sama in the number if protons are called isotopes
Answer:
I think it's D, but it could be B.
Explanation:
<span>Killer whales are much more common in highly productive cold water areas. These include the Atlantic, the Pacific Northwest, and the higher latitudes of the Southern Ocean.</span>
B - Because an active cell can only work if it has a 3-Dimension structure.
