PPT-Evolution: co-evolution

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 . By Frank W. Elwell. Note:. This presentation is based on the theory of Ester Boserup as presented in . The Conditions of Agricultural Growth.. A summary of this and other macro-social theories can be found in . Assessment Statements. Outline. . the method for dating rocks and fossils using radioisotopes, with references to . 14. C and . 40. K.. Define half-life. Deduce the approximate age of materials based on a simple decay curve for a radioisotope.. 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. 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. Ancient hominid fossils not accepted as ancestors. Biases in fossil record (from 19. th. century):. Fossil remains of species not that old (Homo erectus & Neanderthal). Found in Asia and Europe. 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. . Organism DNA. 1a. Some of the strongest evidence for evolutionary relationships comes from studying the DNA of different organisms.. 1b. The fact that all organisms use the same DNA molecule to code for genetic information suggests that these organisms share a distant ancestor.. LAMARCK (1744 – 1829) . He proposed . 3 theories. to explain how species change…. Theory of Need. Theory of Use and Disuse. The Theory that Acquired Traits Can Be Passed on to Offspring.. August Weismann (1834-1914). 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. 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 . 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.