According to the principle of competitive exclusion, two species cannot continue to occupy the same see concept 54.1 (page 1213)

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

Under which of the following circumstances would natural selection not operate on an organism

Describe one of the prairie dog's adaptations and how it the prairie dog to survive