Describe the path of a carbon atom through the process of cellular respiration.

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

Isotopes of the same element have differ in their

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic