You are preparing to bathe a newborn and observe a bluish mark across the newborns lower back. you should understand that this mark is

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Number and 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