The document discusses the process of cell division through mitosis. It begins with how a single fertilized egg cell multiplies through repeated cell division to form a multicellular organism. It then explains the steps cells take to duplicate their DNA and divide, including DNA replication, chromosome formation, and the stages of mitosis - prophase, metaphase, anaphase, telophase and cytokinesis. The end result is two daughter cells that are identical clones of the original parent cell.