Which best defines cohesion?
a: cohesion is caused by polar water molecules attracting each other.
b: cohesion is caused by polar water molecules repelling each other.
c: cohesion is caused by polar water molecules repelling and not mixing with non–polar molecules.

What re the two main phrases of the cell cycle.

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

The ultimate purpose of respiration: a. inhale 02 and exhale co2 b. place oxygen in the lungs c. place oxygen in the blood d. deliver oxygen to every blood cell