Question

what is meant by the term cell division? why it is necessary

Answer 1

Cell division is simply the process of splitting up of one cell into two identical copy cell.It is necessary because it regulates cell growth,development and repairment in multicellular organisms.
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Answer 2

Mitosis is the process of cell division in eukaryotes. Mitosis is important as a form of reproduction in single-celled organisms, like the amoeba. Mitosis regulates cell growth, development, and repair in multicellular organisms. However, if mitosis is out of control, cancer can result.

Cells divide for many reasons. ... Cells also divide so living things can grow. When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.

or

Cell division is the process of separation of two identical copies of the DNA content of a cell that has already duplicated its chromosomes.

It is basically the fundamental event in cellular biology. There is no reproduction without cellular division. There is no growth.

Cellular division it probably the most important physiological event in all biology and it is basically the strategy of life to overcome death.

And, do not forget that uncontrolled cellular division means cancer.
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