PPT-Charles Darwin and Natural Selection

An idea that would change the world Charles Darwin developed his theory of evolution by natural selection using four important observations which led him to two deductions Observations 1 All organisms produce more offspring than survive to adulthood. From its 64257rst publication the theory stirred controversy perhaps not surprisingly for a theory that not only revolutionised biology but had farreaching implications for many aspects of our lives Today Darwins theory in64258uences many areas from 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. How are these iguanas similar? . How are they different?. Do you think they are related? (Do they share a common ancestor?). Darwin’s Voyage. EQ: How did Darwin explain the differences between species on the Galapagos Islands and mainland South America?. How would Hutton and Lyell explain the formation of the Grand Canyon. 2 . Review. What is an acquired characteristic and what role did Lamarck think they played in evolution. 3 . Review. What is artificial selection. Introduction. Charles Darwin was a biologist who lived during the 1800s. Scientific thinking was shifting (biology & geology). Evolution = the process of change over time. Darwin developed a theory that explains how modern organisms evolved over long periods of time through descent from common ancestors.. Born: 12. th . February, 1809, in Shrewsbury. Died: April 19. th. , 1882, in . D. owne, due to heart problems. In 1831, he set sail on the HMS Beagle for a 5-year voyage around the Earth. He married on January 29. Charles Darwin was born February 12 1809 in Shrewsbury England. . He came from a long line of doctors, his father was a medical doctor, and his grandfather was a botanist.. He was described as someone who “loved to explore nature”. Brain Warm Up. What different ways do these animals use to move about?. What traits does each animal have that help it move about as it does?. 15-1 The Puzzle of Life’s Diversity. Humans share the earth with millions of other kinds of organisms of every imaginable shape, size, and habitat.. EARLY THEORIES OF EVOLUTION. DARWIN, WALLACE, & . THE ORIGIN. DARWIN’S THEORIES OF EVOLUTION. WHAT EVOLUTION IS NOT. MODERN SYNTHESIS. BIOGEOGRAPHY. SCHOOLS OF SYSTEMATICS. Early theories of natural history and classification treated living things as immutable and were . 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.. 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..