Cell division is the first stage of growth in living organisms whereby cells divide to form new cells.
(i) In unicelltdar organisms, cell division is a process of asexual reproduction. It leads to an increase in the total number of individuals.
(ii) In multicellular organism, the division of all cells, other than the reproductive cells is known as mitosis. It is a process of cell division related to growth and is accompanied by the cellular enlargement and differentiation.