Why do cells divide?
In eukaryotes (humans/complex organizms), our body cells divide to repair existing, damaged cells, or to make our body grow. This process is called mitosis, and the nucleus of the cell divides. Our sex cells divide to produce more sperm/egg cells in a process known as meiosis. In simple organizms, prokaryotes (single celled bacteria), they must divide for asexual reproduction. They’re only single-celled, so division is the only way to make more of them. This process in bacteria is called binary fission (rather than cell division).
