FREE: Russia. XX century. Science.Used Russian Postage stamp 2000

The listing, Russia. XX century. Science.Used Russian Postage stamp 2000 has ended.

Russia. XX century. Science. Used Russian Postage stamp 2000

The principle of the homologous series in autogenous variation of organisms. N.I.Vavilov. 1920. N.I.Vavilov (1887-1943) - a biologist, an academician of the Academy of Sciences of the USSR (from 1929), the first president of the All-Union Academy of agricultural sciences (from 1929). The originator of the doctrine about the biological foundations of the selection and about the centres of origin of cultivars. The principle of the homologous series in autogenous variation of organisms was detected by N.I.Vavilov in 1920. The principle sets the parallelism in the variation of consanguine groups of organisms. The stamp features the portrait of N.I.Vavilov and a picture reflecting the parallel variation of the barbateness of an ear.