D. As salt water in the oceans.
MITOSIS is used to generate more cells. It is a kind of cell division that the new cells are identical.
Answer:
B
Explanation:
I would say this because the pulmonary circulation only transports deoxygenated blood. And this blood gets transported to the lungs so the lungs can absorb oxygen and release carbon dioxide. I am not sure about this one though. This is what I think.