Scala Naturae is a Way to Compose Periodic System for Biology

No chemist will tell that hydrogen is a simplified helium that originated during the adaptation to the parasitism on the oxygen; therefore, it cannot be put to the beginning of the system of elements, or that similarity of iron and cobalt originated as a convergence, while these elements are not relatives and cannot be put in the one group, while the closest relative to iron is potassium. In biology, such speculations are normal; therefore, there is no biological system reminiscent of the periodic system of chemistry. In a situation like this, the discussion on the growth of complexity inspired by the recent presentation of the carcino-evo-devo concept by A.P. Kozlov should be encouraged. This issue indicates the way to put an order in the classification of biological objects, and therefore the biological knowledge as a whole. It seems possible to compose a modern version of the popular in the past “Scala naturae,” i.e., the arrangement of phyla in the form of a series reflecting the degree of differences from the simplest organism. Similarity among non-neighbors phyla could be revealed in it. This means that the series can be transformed into a periodic table. The article at hand presents a version of such a table. It provides a basis for the analysis of any evolutionary concept, stressing the necessity of filling them by abundant data on diversity of the biological objects.