In the past, objects such as salt, feathers, fur pelts, stones, rare shells, tea and horses have served as

Where would you most likely not find an alpine glacier? the himalayas the rockies the andes flat areas of antarctica

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

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