While there were many species of mites, springtails, and other tiny bugs in our bin, we were missing predators. I ordered a few million nematodes (a kind of tiny roundworm) by mail. Within a few weeks (long enough for the adult flies to die off and their larva to have been eaten) we had a fly-free bin.
All multicellular organisms use cell division for growth and the maintenance and repair of cells and tissues. Single-celled organisms use cell division as their method of reproduction. Somatic cells divide regularly; all human cells (except for the cells that produce eggs and sperm) are somatic cells.
Mitosis is a form of cell division, which single-celled eukaryotic organisms use to reproduce. In multicellular organisms, mitosis is used for growth and repair. From a fertilized egg to a new born baby to an adult, all that growth comes form mitosis.