Why is natural selection important to evolution?
Natural selection is important to evolution because the environment selecting for the "best" traits causes a species to evolve.
Natural selection, the nonrandom survival and reproductive success of individual organisms, is no the only driver of evolution but it is the driver of adaptive change leading to speciation. So, the descent with modification that Darwin spoke of, long term evolution, is driven by variation and natural selection.
Natural selection explains the process of evolution: evolution by natural selection. It basically means that species with the highest fitness (survival rate) will live, and be selected by nature for the characteristics they possess that make them more apt to survive. Because of natural selection, evolution occurs.
George C. Williams has written: 'The pony fish's glow' -- subject(s): Adaptation (Biology), Evolution, Human evolution 'Plan and purpose in nature' -- subject(s): Adaptation (Biology), Evolution, Human evolution, Natural selection, Evolution (Biology) 'Natural selection' -- subject(s): Natural selection 'Adaptation and natural selection' -- subject(s): Adaptation (Biology), Natural selection
There is no " theory of evolution " as evolution is a fact. The theory is; the theory of evolution by natural selection and explains much about the fact of evolution. Charles Robert Darwin and Alfred Russel Wallace come up with the theory of evolution by natural selection, though natural selection is a phrase coined by Darwin.
Organic evolution is the process by which the genetic makeup of a species changes over time. There are several mechanisms by which this can happen: natural selection, genetic drift (chance), migration and mutation. So natural selection is one possible way in which evolution can take place. Most biologists agree that natural selection is the most important mechanism of evolution. This mechanism was first discovered by Charles Darwin and, independently. by Alfred Wallace.