Which division is necessary to maintain constant chromosome number in all body cell of multicellular organism and why ?

Explanation

Mitosis is necessary to maintain constant number of chromosomes in all body cells in muticellular organisms because mitosis results in the production of diploid daughter cells with genetic employment usually identical to that of the parent cell. The growth of multicellular organisms is due to mitosos. Cell growth results in distributing thr ratio between the nucleus and cytoplasam. It therefore essential for the cell division to restore the nucleo-cytoplasamic ratio. A very significant contributiono of mitosis is cell repair. Mitotic divisions in the meristametic tissues, the aplcal and the lateral Meristems, results in a continuous growth of plants throughout their life.