Socio-economic preconditions The socio-economic prerequisites for the emergence of Darwin’s evolutionary theory are associated with the rapid development of capitalism in England, which led to the growth of
The cause of combinative variability is the formation of new combinations of existing genes. Combinative variability is based on three processes: exchange of sections of homologous chromosomes (crossing
Phenotypic (non-hereditary) variability arises under the influence of environmental factors and does not affect the genotype. The following types of phenotypic variability are distinguished: modifications, morphoses, and phenocopies.
One of the most important properties of living organisms is the ability to change signs depending on environmental conditions. Variability is the emergence of individual differences between individuals
Criteria are signs by which individuals of one species differ from individuals of other species. The main criteria are morphological, physiological, genetic, biochemical, ecological, geographical and historical. The