How the identical single cells evolved into more complex cells is as little understood as how life initially began.
We don’t really know how the first cells on earth evolved. What we do know, however, is that the prokaryotic cells developed nuclei.
Nuclei, the plural of nucleus, are enclosed centers of operation, containing the DNA and enzymes that dictate the processes of life.
Separating the essential information that runs the program of life provided physical protection for the all-important chemically coded programs.
It also allowed for the development of specialized functions.