THE DIVISION OF THE PROTOPLAST 



57 



SOMATIC CELL DIVISION IN PLANTS 



Cell division includes both the division of the nucleus by a process 

 known as mitosis, or karyokinesis, and the di\ision of the cytosome, or 



-f^i^ 



Fig. 37. — Portion of longitudinal section of root tip of onion. Prophase, nietapha.sc, 

 anaphase, and telophase stages of mitosis are visible. {Courtesy of G. H. C'onant.) 



cytokinesis. Mitosis often occurs without cytokinesis, as in coenocytes, 

 and sometimes cytokinesis takes place without nuclear division. Mitosis 

 and cell division are therefore not svnonvmous terms. 



