Give me the definition of diffusion

The definition of Diffusion is: The movement of molecules from a high concentration to a low concentration. Many molecules diffuse across cell membranes.

I know this because I looked it up in my science text book and did some research online.

Hope I helped!

- Debbie

Four compound and their monomers include Amino acids, monosaccharide, fatty acids and Nucleotides which are a sugar phouphate and a base.