1. The number of germ cells increases by mitosis in the process of spermatosis and oogenesis.
2. Lower plants reproduce by mitosis cell division. Chlamydomonas and Chlorella reproduce by mitosis.
3. Cuttings, layering, grafting etc. are produced by division of mitosis.
4. Genitalia of multicellular organisms are formed through mitosis cell division. This process is necessary to increase the number of reproductive cells.