Large quantities of water molecules constantly move across cell
membranes by simple diffusion, but, in general, net movement of water
into or out of cells is negligible IS CALLED OSMOSIS. For example, it has been
estimated that an amount of water equivalent to roughly 250 times the
volume of the cell diffuses across the red blood cell membrane every second; the cell doesn't lose or gain water because equal amounts go in and out.
Mitosis is a process of nuclear division by which replicated copies of a cell's DNA. are organized into chromosomes. Tin mitosis, the dissolution and reformation of nuclear membranes, the. formation of the mitotic spindle, and the division of the cytoplasm.