PPT-Lesson # 4: Evolution (On the Origins of Species

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. Bio . HL. Full Classification of Humans. Kingdom - . Animalia. Phylum - . Chordata. Class - Mammalia. Order - . Primata. Family - . Hominidae. Genus - Homo. Species - Homo sapiens. subspecies - H. s. sapiens. (Processes + Patterns of Evolution). Evolutionary Change via Selection . . Types of selective pressures may result from: . i.e. climate conditions, food availability, predators, and choice of mate etc.. “Evidence for Evolution”. We will look at major evidence supporting theories of evolution:. Fossil Record . Comparative Anatomy . Biogeography . Biochemistry. Evidence Supporting Theories of Evolution . A mechanism for change in populations.. Any change in the . inherited . traits within a population across generations. Individuals better adapted to their environment tend to survive and . produce more offspring. “Both in space and time, we seem to be brought somewhat near to that great fact—that mystery of mysteries—the first appearance of new beings on this Earth.”. — Darwin. What is a species?. Biological species concept. Born in England in 1809. Enrolled in divinity school at Cambridge; graduated in 1831. In 1831, Darwin signed on the naturalist on the HMS Beagle & traveled around the world for the next 5 years. He gathered data during his travel; that data was used as the basis for his books and ideas on evolution. Early atmosphere, evidence, natural selection and disease agents influence natural selection. . Introduction . Evolution “ simple” definition: change over time. Evolution helps us to understand the history of life.. Early scientists proposed ideas about evolution. . Evolution is the biological change process by which descendants come to differ from their ancestors.. A species is a group of organisms that can reproduce and have fertile offspring.. Chapter 17: Processes of Evolution. Early Beliefs. 19. th. century: discovered species shared many traits, but lived in different parts of the world. Problematic – species only looked similar on the outside, but inside were very different . Science. Comparison with blood chemical (‘B’) between humans and other vertebrates.. humans. -. chimpanzee. 0. chicken. 11. Rhesus monkey. 1. frog. 17. mouse. 8. lamprey. 29. Challenge answer. What organisms are most closely related to us? . Evolution. – when a species of plants or animals adapts to their environment in order to survive over a long period of time. Key points!. Species. Plants or Animals. Adaptations. In order to survive. Evolution 9/11. Obj. TSW learn form mistakes made on the quiz, and take notes about evolution after the Environmental Science Current Events. P. 34NB. Make a food chain for the following organisms showing the energy arrows and the . . 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. . 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.