Fact 1: Urine is the liquid waste product of the body that is excreted by the urinary system. Fact 2: Mammals excrete urea in the watery form of urine . Given the two facts above, what is a waste product of the body that is excreted by the urinary system?
Choices: (A). potash; (B). food; (C). CO 2; (D). sugar; (E). urea; (F). liquid; (G). H 2 O; (H). sulfur;
Answer:
(E).