Distinction of two opposite directed the time processes is considered: preservations of species and evolutions. On the basis of Hardy - Weinberg law the analysis of the reasons of the species preservation is submitted. With the help of a Greens function for a population it is shown that at mutational influence on a population there is a disappearance of a mutational influence result f... https://ashleyshomestores.shop/product-category/rect-drm-counter-tbl-set3-cn/