How do we know the sun rotates?

a) both sides are red-shifted.
b) because the earth rotates.
c) both sides are blue-shifted.
d) one side is blue-shifted and the other side is red-shifted.

Which locations on the map are low-pressure areas? a b c d e

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.

Water diffusing through a semipermeable membrane is called