A scientific theory should not be regarded as reliable.

True

False

Why is excretion necessary to maintain homeostasis?

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

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.