* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Natural Selection and Evidence for Evolution
Survey
Document related concepts
Sexual selection wikipedia , lookup
Unilineal evolution wikipedia , lookup
Hologenome theory of evolution wikipedia , lookup
Natural selection wikipedia , lookup
Catholic Church and evolution wikipedia , lookup
Vestigiality wikipedia , lookup
Paleontology wikipedia , lookup
On the Origin of Species wikipedia , lookup
Saltation (biology) wikipedia , lookup
The Expression of the Emotions in Man and Animals wikipedia , lookup
Genetics and the Origin of Species wikipedia , lookup
Theistic evolution wikipedia , lookup
Transcript
Do Now • Explain why the following statement is false: • A giraffe living in the savanna is having difficulty reaching the leaves on trees. His neck is too short to reach them. The giraffe stretches his neck everyday and eventually his neck is long enough to reach the leaves. The giraffe later has offspring who have inherited this long neck too. 10.3 Darwin Presents His Case Darwin Island I. On the Origin of Species A. Darwin wrote a book based on all of his notes. B. His conclusion was eventually called evolution by natural selection C. His findings directly disputed everything he believed about the origin of life. D. Was afraid to publish the book II. Alfred Wallace A. 25 years after Darwin returned from the Galapagos, Wallace sends him an essay. B. The essay was about evolution. C. Darwin published his book immediately. D. Darwin and Wallace present their info to other scientists and it became controversial III. Artificial Selection/Selective Breeding A. Darwin knew nothing about genetics B. He noticed that plants and animals had differences or advantages over each other C. Farmers chose the better organisms to breed another generation IV. Natural Selection A. Also known as Survival of the Fittest B. Darwin and Malthus saw competition for survival (struggle for existence). C. Organisms that were well suited to their environment were fit due to adaptations they inherited. (examples p. 461) D. The better suited (fit) animals survived, less fit died out changing the population over time. http://www.youtube.com/watch?v=0SCjhI86grU http://www.youtube.com/watch?v=ZPDwyjzRBJ0 E. Misconception: Organisms that just so happen to have a trait that benefits them are the ones “selected”. V. Descent with Modification A. Used to explain why each species looks different today than their ancestors B. Each living species has descended, with changes, from other species over time. C. Implies that all organisms are related (common descent) VI. Evidence of Evolution A. Fossil Record 1. remains of ancient life 2. imprints, amber, ice, rock, tar B. Homologous structures 1. anatomical similarities among organisms but have a different function Analogous Structures • Similar function, but different origin – Ex: Insect wing vs. Bat wing • Both important in flight, but only one has bones! C. Vestigial Structures 1. organs that have no useful function and have often shrunk in size to a trace (vestige). Nictitating membrane D. Embryology 1. embryonic stages of many organisms are similar E. Biochemistry 1. similarities in body chemicals between species Amino acid similarities Evolution: Library: Whale Evolution http://www.pbs.org/wgbh/evolution/library/03/4/l_034_05.html http://www.youtube.com/watch?v=I2C-3PjNGok http://www.youtube.com/watch?v=faRlFsYmkeY http://www.youtube.com/watch?v=GhHOjC4oxh8 http://www.bing.com/videos/search?q=natural+selection&view=detail& mid=9E4761D1DECC4A33D8639E4761D1DECC4A33D863&first=0& FORM=NVPFVR&adlt=strict