ABSTRACT
In order to be able to present an intelligible story of the essentials of the evolutionary process, it is necessary first to give a muchsimplified account of the genetic material of the cell, deoxyribonucleic acid (DNA), and of the mode of its action via the genetic code. The segregation of this essential evolutionary material into the cell nuclei was achieved very early in the evolution of the unicellular eukaryotes that arose about 1.8 billion years ago. This was a very important evolutionary development because it protected the complex machinery that is central to all cell activity including reproduction.
