What makes up the "head" region of a phospholipid? Is it hydrophobic or hydrophilic?

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

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

Moving down the ramp from 6 meters to