PPT-EVIDENCES OF EVOLUTION

TEST MARKS14½ What is doctrine of evolution 1 1 What is homology 2 1 Describe homology with respect to fore limb in animals 3 2 Give examples of homology in plants. THEORY OF EVOLUTION. The theory of evolution is scientists explanation of how living things began. .. Also called organic evolution . LIVING ORGANISMS HAVE CHANGED GRADUALLY OVER TIME TO FORM NEW ORGANISMS THAT ARE MORE COMPLEX.. Evidence of Evolution. Essential Questions. What is the anatomical evidence of evolution?. How are fossils used as evidence of evolution?. What evolutionary evidence do we have from the field comparative embryology?. Which one?. There are 3 great universal questions. 1) Where did I come from?. 2) Why am I here?. 3) Where am I going?. The answer to the last 2 questions are dependent upon the answer to the first question. . 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. Myth #1: We’re going to walk to Missouri to prepare for the Second Coming.. BACKGROUND: Joseph F. Smith: “When God leads the people back to Jackson County, how will he do it? I think I see people wending their way across the great plain and not traveling by railroads...”. Mechanisms of concerted evolution. Unequal cross-over. Gene conversion: non-reciprocal transfer of information between homologous sequences; the main mechanism invoked to explain concerted evolution. (Hons), Zoology. Panjab University, Chandigarh. ORIGIN OF UNIVERSE. BIG BANG THEORY. Thermonuclear explosion. Origin of universe occurred 20 . bya. .. ORIGIN OF EARTH. NEBULAR HYPOTHESIS. Condensation of gases under Gravitational force. Comparative study of . morphological and anatomical structures. of animals and plants also indicate that they are constructed on the same basic plan and they shows certain similarities.. Such similarities are observed in:. of . the Red . Queen. CfE. . Advanced Higher Biology. Unit . 2: . Organisms and Evolution. SQA mandatory key information. A change in the traits of one species acts as a selection pressure on the other species. . Anatomical Evidences:. Body . organisation. Vertebrate organ-systems. Homologous organs: the organs of different animals having similar position, structure and embryonic origin are called homologous organs.e.g. vertebrate forelimbs the forelimbs of seal,bird,bat,horse and man. . Biogeography. is the study of . distribution of animals and plants. on this earth. . The . evidences. of evolution . based on biogeography. (G. bios- life, geo- earth, . grapho. - to write) . are called biogeographical evidences. 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. MARKS-14½. What is doctrine of evolution?. 1 1. What is homology?. 2 1. Describe homology with respect to fore limb in animals. . 3 2. Give examples of homology in plants.. 4 1½. . 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.