An action potential is generated by the movement of

As a small change in a person's dna can cause a genetic disorder

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

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart