Answer: All cells are unique and made for a particular reason. Various parts of an organism contain variety of cells. Because of this, cells are differentiated and develop their own group This allows them to do their job and to be more productive than operating alone as well. The division happens in the initial stage of a cell. Each cell undergoes modifications and develops unique properties. This process is called cell differentiation. They all work on their allocated roles after the separation. Several examples include muscle cells, fat cells, nerve cells, and so on.