PPT-Darwin and His Theory of Evolution by Natural Selection

Evolution changes in the characteristics of groups of organisms over time Charles Darwin was the first to propose a feasible mechanism for evolution It is called natural selection Evolution by Natural Selection is a theory . Radinka. Charles Darwin. Charles Darwin was born in February 1809 in Mount Shrewsbury UK. . He was educated in Shrewsbury School then sent to Edinburg University to study medicine. Two years later in 1827, he was beginning a degree in divinity (study of religion) at Cambridge. . Scientific Theory. Social use of the word “theory”. Not the same as in science. Implies a hunch or a casual guess. Scientific Theory. 1. Highly probable explanation based on vast collections of scientific data. Change over time…. Geology. Began to study rock layers called strata. George Cuvier. Studied fossils. Found extinct species and noticed the deeper the fossil the more unique. Catastrophism. Charles Lyell. Danielle Donahue. Aa. A. daptation: a well fitted feature that aids in the survival of a population. Example: the blind cave salamander has no use for eyes because they live in complete darkness. Bb. Modern Theory of Evolution) . Review Questions. What structure does this picture represent?. Answer: Homologous Traits . What is an adaptation?. A) . A test for natural selection . B) . A. . physical or behavioral characteristic that has developed to allow an organism to better survive in its environment. Evolutionary Ideas. A. lthough Darwin is given much credit for evolutionary theory, he was not the first person to come up with the idea.. Evolution is the change in a population over time.. The concept of evolution had been discussed for more than 100 years prior to Darwin’s theory.. A. Species overproduce offspring that may survive an environment.. B. There is little variation among members of a population.. C. Competition for resources, mates, and space among species leads to a struggle to survive.. His Case. THINK ABOUT IT . Darwin wrote up a complete draft of his ideas about natural selection, but he put the work aside and didn’t publish it for another 20 years. . Darwin knew that his own theory was just as radical as Lamarck’s, so he wanted to gather as much evidence as he could to support his ideas before he made them public.. Background Info: Charles Darwin. Set sail on the HMS . Beagle. . 5 year trip around the world. Naturalist: a person who studies the natural world. He wanted to learn about the living things he saw on the voyage . Week 9:. By Mackenzie and Emily. Michael Banton, . Racial Theories . (Cambridge: Cambridge University Press, 1998), Ch. 4, ‘Race as Subspecies’, pp. 81-116. ‘With the recognition that plant and animal populations were distinguished by the gene frequencies they had acquired in the course of evolution… a new foundation was laid for biological science’ (p. 116).. wallace. and was explained in book “ on the origin of species by means of Natural Selection . . Darwin put the theory based on his observations as he travelled round the world on the ship Beagle.. Course Objectives. Describe the importance of Jean-Baptiste Lamarck, Charles Darwin, Alfred Wallace, Charles Lyell, Stephen Jay Gould, to the development of evolutionary theory.. Describe five ways that fossils can form including amber, tar pits, petrification, sedimentary rocks, and ice.. What is a scientific theory?. In science, the word theory applies to a well-tested explanation that unifies a broad range of observations and hypotheses and that enables scientists to make accurate predictions about new situations.. . The process by which organism change over time. Based on science, not opinion.. Darwin. :. Evolution is descent with modification. Evolution. :. changes through time. Species accumulate difference.