Which statement is not part of the concept of natural selection? variation occurs among individuals in a population. more individuals are produced than will survive. individuals that possess the most favorable variations will have the best chance of reproducing. genes of an individual adapt to a changing environment.

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