. Which represents the hierarchical organization of a multicellular organism, from least complex level to most complex level?
a. cell, organ, organ system, tissue
b. tissue, cell, organ, organ system
c. cell, tissue, organ, organ system
d. organ, cell, tissue, organ system

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.