The earliest multicelled organisms on Earth were: a
Bacteria
b
Vertebrates
c
Invertebrates
d
Plants

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

Pulmonary arteries carry highly oxygenated blood. true or false?

Use the numbers to place the companies in order of greatest comparative advantage to least comparative advantage in producing large tubes of toothpaste.