section_heading: Podrijetlo i razvoj parazitskog života
paragraph_text: By adopting a parasitic mode of life with use of nutrients from their hosts mycoplasmas were able to reduce their genetic material considerably. On the other hand mycoplasma lost the genes for many assimilative processes. Thus Mycoplasma possibly became the smallest self-replicating organism in nature. Especially Mycoplasma genitalium has with 580,000 base pairs a very small genome size. Some phytoplasmas also have a very small genome size. The genera with the smallest genome are considered to be phylogenetically the most "recent" mollicutes. -->