The third one 'every type performs the same function' is not true.
Skin cells operate differently compared to brain cells, plants cells and animal cells are hugely different, etc. Cells are specialised to achieve a certain purpose and function in living things.
You have billions of cells in your body if not more, and they all don’t have the same function. So you can think about white blood cells who fight off bacteria and red blood cells carry oxygen throughout the body. I hope this helps
