What term best describe the role of carbon dioxide in the human body

What came first egg or chicken? and is tomato a vegetable or a fruit?

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.

What controls activities within a eukaryotic cell?