Predict what might happen to a population of people who do not understand the nature of science. use examples of keys issues facing our society.

Variety of living organisms; includes genetic, species, and ecological types.

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

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes