While evolution is accepted by most scientists, natural selection is vigorously debated. Darwin proposed gradual natural selection whereby changes accumulated slowly over geological time. Other evidence suggests that at times evolution can proceed very rapidly. In reality, evolution probably proceeds slowly in most circumstances but in some situations can be rapid. Artificial Selection is the deliberate attempt by man to change the genetic characteristics of plants, animals, or microorganisms.
Artificial selection is practiced to make the organism more useful or more pleasing to man.
For example, hundreds of varieties of dogs have been bred for various tasks from hunting, tracking, to guarding and for esthetic reasons. Similarly our domestic crops have undergone extensive breeding to make them more useful and productive. Corn has been bred to such an extent that is no longer capable of surviving in the wild. Selection whether artificial or natural makes changes in the genetic code by differential survival and reproduction. The changes are are inherited by the offspring.