since electron microscopes use electrons to bounce off the object, they need a vacuum, so that it won't bounce off any air molecules. and, it's resolution is a lot better than that of a light microscope. also, it can magnify to the millions, while a light microscope can only magnify to the thousands.
Mitosis is a type of cell division in which a cell divides into two daughter cells each having the same number of chromosomes as the parent cell. It ensures that every body cell contains the same number of genes as the parent cell. The cell that have 78 chromosomes have undergone mitosis while the other cells that contain 39 chromosomes undergo meiosis.
