Why is reproduction classified as of life function

Match the description of each organism to the appropriate category

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.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.