Why does the mitochondria gene tree suggest a later split

What is the name for a substance formed in a chemical reaction

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

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