Evolution
Enviado por laredo74 • 5 de Diciembre de 2013 • 439 Palabras (2 Páginas) • 187 Visitas
Abstract
Evolution is not intuitive, nor would any sane gambler bet on its odds. There are no proofs, no conclusions based upon experimentation and testing. What we know about evolution derives from historical narrative the evolutionary biologists reconstruction of what might have happened. Evolutionary change depends upon heritable variation. For a vast majority of humans, society, religion, and or law govern mating. In many societies, close relatives are not permitted to reproduce, thereby removing the powerful genetic effects of inbreeding from the process and biasing the gene pool. Most adaptive evolutionary change occurs in conjunction with speciation. Natural selection shapes most evolutionary adaptive changes nearly simultaneously in genetically independent lineages as speciation is triggered by extinction in turnover events such turnover events have causal roots that are deeply ecological and arise, at base, from large scale changes in the physical environment. Humans manufacture large scale change.
Evolution is the popular belief that a unicellular organism or something even simpler evolved, over time, to form all that we see today; that being: animals, humans, plants, etc.
There are many mechanisms that lead to evolutionary change. One of the most important mechanisms in evolution is natural selection which is the differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Natural selection occurs when an environment makes an individual adapt to that certain environment by variations that arise by mutation and genetic recombination. Also it favors certain traits in an individual than other traits so that these favored traits will be presented in the next generation.
Also is a force than nothing can escape. Communities evolve constantly and although there is no standard of where a society should be at any given moment, communities evolve individually. Then in reaction to a developing community, people grow and change. Then in reaction to people evolving the tools that people use develop. This constant evolving usually happens so gradually and slowly that it is hard to detect. As we look back we can see the evolution is a major component of our lives.
Evolution is becoming the most accepted story due to the vast amounts of evidence supporting it such as fossil structures, anatomical and embryonic similarities of related life forms, the geographic distribution of species, and of course, natural selection. For example, early mammals, in their embryonic state, are almost identical, showing similar structures and organs. Anatomical similarities among species of the same genus are also evidence of evolution, years.
The most common and most easily demonstrated evidence of evolution is natural selection. The
...