Cell walls are visible. Cell walls are a little clearer. Cell walls are more detailed. It is unbelievable because it looks different under a microscope than looking at it with the naked eye. Also cell walls are visible.
Cell walls are detailed.
The difference is that the iodine helps you see the nucleus in each cell. Cell walls are more detailed. Adding the iodine to the onion skin kills the cell. It is that there is more to to what you see with just your eyes. With microscopes we can see a whole new world under our eyes.