Ensayo

Charles Darwin:
“The origin of species”
Charles Robert Darwin (February 12, 1809 - April 19, 1882) was an English naturalist who posited that all species of being live have evolvedover time from common ancestors through a process called natural selection.
What is the origin of species? This is the question that Darwin through his research effort answered. CharlesDarwin's theory of evolution by natural selection can be viewed, simplistically, as based on a series of propositions. The individuals who constitute a population of a species are notidentical; show variations, sometimes very small, what is a major problem in determining whether a variety of a species is in fact another species. Therefore, consider the concepts ofspecies and variety as arbitrary (both apply to distinguish). A high degree of variability is obviously favorable, as it provides materials selection to work, but natural selectionaffects only the useful variations, variations with adaptive value. On the Laws of the change, identifies two factors: the nature of the organism, and the nature of living conditions. Butgives less importance to the direct action of the surrounding conditions that tend to vary due to unknown causes he believes. These facts are unknown today what is known as spontaneousmutation and genetic recombination.
At least a part of this variation is inherited. In other words, the offspring has a tendency to share certain characteristics with the parents.Observed a reversal or a return to the characters of the ancestors lost when a character reappears, the character in question has remained latent in all succeeding generations until at lastreappears. Therefore, although they did not know the mechanisms of heredity, Darwin seemed to be on the right track, despite the erroneous theory postulate of pangenesis (1868).