Why are all the different parts of the cell necessary?
answer

All the different parts of a cell are necessary because they all work together for a common goal. If even one of them goes wrong, it will throw off the tasks and movements of the others. This will cause damage to the cell. Hope this helps :)

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation: