If your sleeping child eyes is moving back and forth while his eyelids are closed it is likely that he is sleep
My Answer: DNA cloning.
Hope I helped! :D
Answer:
The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.