What is true about the Krebs cycle? Two turns of the cycle are required to break down the two pyruvate molecules from glycolysis.

It occurs in the cytoplasm of the cell.

It is the final stage of cellular respiration and produces the most ATP.

It is an anaerobic process and thus does not require oxygen.

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