Technology of storage and primary processing of agricultural products

Formation of species . Under the influence of various evolutionary factors, changes in the genetic composition of a population occur within the range. Some of these evolutionary phenomena may continue unabated, and new characters may accumulate in the population due to natural selection and isolation. As long as the species are able to interbreed freely and produce offspring, the species will survive as a whole complex system. But due to strong isolation, the flow of genetic information can be stopped. However, in isolated species, the changes that occur under the influence of elementary evolutionary factors accumulate, and the isolated group reaches the level of genetic independence. The emergence of separation between the representatives of the first, integral species, the distribution of separate groups from the species - this is the process of species formation. Species formation occurs in 2 different ways : Allopatric and sympatric.
Allopatrik round (or geographical tour to be sure) to be more common among animals, plants, nature. It occurs due to expansion from the range of the initial tour or due to historically emerging obstacles from the range. Separation from the area is always due to historical reasons in nature, the reasons for which may vary. For example, the separation of population and species into bounded areas due to the emergence of different species leads to the separation of populations and species. For example: Prior to the ice age, the forest pearl area was intact, due to freezing the area is divided into confined parts, where independent clearly demarcated populations appear, which some scientists consider to be a young species. The formation of the allopatric species can also be observed on islands around the ocean. For example. The scatterings in the Galapagoss Islands are noteworthy. Vyuroklarni distinguish between main characters, the structure of the nose. At the same time the structure of the beak depends on different eating habits. For example: The beak of the earthworm has a long beak and a separate tongue, and representatives of this species feed on cactus flowers. The other is the large seeds of the main food plants of the large earthworm with a large thick and short beak. The eucalyptus tree has a straight beak, just like a reddish beak, and it pierces the trees and picks up insects under its bark. As Darwin described, the species of virogens are not intermingled, which indicates that they have well-developed isolating mechanisms.