Phylogenesis is this process of historical development of living nature and to certain groups of components of organisms. Scientific basis of phylogenesis is created by Charles Darwin evolutionary doctrine (see). The study of fossils of extinct plants and animals involved in paleontology, allowing to trace the origin and the succession of organisms. Information about phylogeny of life forms also deliver comparative anatomy that maps the structure of different organisms (from the most primitive to the most highly organized), and embryology, exploring the development of an individual organisms. Schematically the phylogeny of animals and plants are usually in the form of so-called family tree building, the barrel of which corresponds to the initial forms of life, and branches are all subsequent numerous and increasingly complex forms. Cm. the Ontogenesis.