Labels:bulletin board | clock | crt screen | earth | fire hydrant | ootid | person | plant | pole OCR: EYEWITNESS ENCYCLOPEDIA OF SCIENCE GROWTH HEN an organism grows a process called mitosis during which it adds more cells to itself the in a cell double aud and becomes more complex Once au divide and then the cell splits into two organ ism has grown, 1t cannot return this way each new cell ends up its ori ginal size Growth nociurs an exact replica of the original cell. Nucleus Original cell (control center) Cytoplasm Chromosomes Nuclear membrane MITOSIS SEE ANIMOL PLANT ALSO GROWTH GROWTH occurs