Final answer:
Cells differentiate so that simple, non-specialized cells can become highly specialized cells.
Step-by-step explanation:
Cells differentiate so that simple, non-specialized cells can become highly specialized cells. When a cell differentiates, it undergoes major changes in its size, shape, metabolic activity, and overall function. This differentiation process allows cells to express a specific set of genes that are relevant to their function, leading to the development of different cell types in the body. While all cells have the same DNA, each type of cell only 'reads' the portions of DNA that are necessary for its own function.