Because in the dark only the rods are the working part in your eyes and they only detect dark colors or purple to be specific
Embryonic stem cells have the potential to produce regenerated tissues, such as skin. They could provide means of healing diseases such as type 1 diabetes where a particular cell has been lost or is malfunctioning.
I believe that Cytokenesis follows Mitosis, because cytokenesis is the actual split of the cells' membranes (after telophase)! Hope this helps