Week 6: Natural selection

 Lets talk more deep about the process that Darwin proposed that is called Natural selection. This is a process fundamental to evolution as described by Charles Darwin. By natural selection, any characteristic of an individual that allows it to survive to produce more offspring will eventually appear in every individual of the species, simply because those members will have more offspring. All the world pass the process of natural selection because the environment is always changing an this cause changes in all the organisms that that live on it.Evolution by natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines, including paleontology, geology, genetics and developmental biology.

The theory has two main points, said Brian Richmond, curator of human origins at the American Museum of Natural History in New York City. "All life on Earth is connected and related to each other," and this diversity of life is a product of "modifications of populations by natural selection, where some traits were favored in and environment over others," he said.More simply put, the theory can be described as "descent with modification," said Briana Pobiner, an anthropologist and educator at the Smithsonian Institution National Museum of Natural History in Washington, D.C., who specializes in the study of human origins.The theory is sometimes described as "survival of the fittest," but that can be misleading, Pobiner said. Here, "fitness" refers not to an organism's strength or athletic ability, but rather the ability to survive and reproduce.

In the image we can saw a example of natural selection. In this case is about giraffes and its neck. Those animals create a very long neck by natural selection to maintain it selves alive. The nature make this change in those animal because without that this specie can dissapear. This is something that is progressive because all the world is in constant change.

Image retrieved from: www.google.com
definitions retrieved from: Text book Biology Campbell