1. Mitogens: Substances that stimulate cell division are called mitogens. Cytokinin stimulates plant cell division. Steroids, lymphokines, EGF (Epidermal growth factor), PDGF (Platelet derived growth factor) etc. stimulate animal cell division. Cell division occurs due to these chemical elements.
2. Gene regulation: Cell division is a gene regulation process. Cell division begins when the amount of DNA in the nucleus doubles.
3. Increase in cell number: Cells divide to increase the number of cells. Cells do not increase in number unless they divide.
4. Increase in cell volume: Cell division occurs to increase cell volume. Cells divide repeatedly to increase cell volume.
5. Cell Metabolism: Different types of metabolism take place in cells. Cell division is necessary for carrying out metabolism.
6. Nucleo-Cytoplasmic Ratio: Nucleo-cytoplasmic ratio is maintained through cell division.