8+How+Do+Species+Evolve?

Species evolve through the process of natural selection.



natural selection is the gradual nonrandom process by which biological traits become either more or less common in a population as a function of differential reproduction of their bearers. It is the key mechanism of evolution. It acts on the phenotype. Natural selection is one of the cornerstones of modern biology. The term was introduced by Darwin in his influential 1859 book //On the Origin of Species// In 1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation


 * An **adaptation** in biology is a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection
 * adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation

Adaption is the result of the former. After gene pools change by natural selection, populations aquire the traits of their ancestors that helped them survive. An example is the thumbs of pandas that have become more and more suited to grabbing bamboo than they were many years ago.

Natural Selection can also occur in **plants** media type="youtube" key="ZPDwyjzRBJ0" height="315" width="420" align="center"

The initial model shows exact evidence and processes, and would not change as a result of any evidence.