Besides urea, what other compound must be available for the urease enzyme to break down urea?

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

Which u.s. state lists the horned toad as its state reptile?

Can someone give me the answers to this?