Animal and plant cells contain a nucleus, cell membrane, cytoplasm, mitrochondria and ribosomes.
You need to know the functions of these different organelles.
Plant cells also have a cell wall, chloroplasts and a permanent vacuole.
Know the functions of these organelles in plants.
Some cells are specialised to carry out their function.
Materials are transported across cell membranes by diffusion and osmosis.
Know how the process of diffusion and osmosis are similar and what the differences are betwen them.