The cell wall is the protective, semi-permeable outer layer of a plant cell. A major function of the cell wall is to give the cell strength and structure, and to filter molecules that pass in and out of the cell. A cell is the smallest part of an organism that still contains that organism's elements.
It’s the study of people and the outside world
A heart beat, breathing, and moving ;)
Diffusion is the movement of molecules from an area where they’re at a higher concentration to areas that have a lower concentration - goo gle
