What is the difference between diffusion and osmosis

Which describes radioactive decay of a substance

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.

Were you able to observe the nucleolus in any of the cells if so which ones