Which phrase best describes the intertidal zone?A. always dryB. has changing conditions as the ocean alternates between high and low tidesC. always covered with salty waterD. no organisms are able to survive because they are constantly moved by waves

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