Darwin's Theory Of Evolution By Natural Selection

Biology Evolution Essay
The theory of evolution is one of the great explanations of human history, drastically changing our view of the world. Evolution is the process of biological change by which descendants come to differ from their ancestors. Charles Darwin proposed his theory of evolution and supported it with a great body of evidence and examples. In Darwin's time, most scientists fully believed that each organism and each adaptation was the work of the creator. Yet Darwin proposed his theory of evolution by natural selection .
While on his voyage , Darwin encountered exotic plants and animals that challenged his thinking and led him to consider scientific evidence in new ways.In the Galapagos Darwin collected samples of mockingbirds, and later observed that the birds were somewhat different on each island. This made him wonder that the birds had a common ancestor,he would later figure out this was

Darwin noticed a lot of variation in domestic plants and animals. Breeders would select certain traits to produce a great amount of diversity. This was know as artificial selection , the process by which humans change a species by breeding it for certain traits. Darwin used this line of thinking for his theory of natural selection, the complete opposite. Natural selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring. Therefore , in nature characteristics are selected only if it gives the animal an advantage in their environment. Natural selection explains how evolution can occur. There are four main principles to the theory of natural selection. Variation is associated with heritable differences and overproduction results in competition . Adaptation allows individuals a better chance of survival. Descent with modification is when the environment plays a role so that traits are passed