PPT-Meiosis Unit 2: Organisms and Evolution

Advanced Higher Biology Miss A Aitken National 5 ReCap Haploid One set of chromosomes 23 All gametes sex cells sperm and egg are haploid Diploid Two sets of chromosomes 46 or 23 pairs. 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). Define the term variation.. Discuss the fact that variation occurs within, as well as between, species.. Describe the differences between continuous and discontinuous variation, using examples of a range of characteristics found in plants, animals and other organisms.. 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. 1. Blood . proteins in horses are chemically similar to blood proteins in monkeys. This similarity suggests that horses and . monkeys:.   .  . . a. can interbreed  .  . b. evolved at the same time  . History of Evolution. The evolution of life is linked to the physical and chemical evolution of the earth.. Life on earth evolved in two phases over the past 4.7 -4.8 billion years. Chemical evolution (1 billion years) of the organic molecules and systems of chemical reactions needed to form the first proto-cells.. I. Evolution and Evolutionary. Evolution—change in gene frequency in a population over time. Change must be genetic. Occurs in a population—not individuals. Time depends on how fast environment changes and how fast organisms reproduce. 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 . Warm Up: Set up your notes in your notebook. Page: 55. Title: Cladograms. Date: 1/18. EQ: How can I model divergent evolution. Standard. : B8B Categorize organisms using a hierarchical classification system based on similarities and differences shared among groups. Context and Introduction to Unit. In this unit pupils will learn about evolution and how species have evolved from three billion years ago through the process of Natural Selection. Pupils will learn about the importance of biodiversity is ensuring the human population survives.. . 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. and Variation . What is Evolution?. Simply… a change in living organisms over time. Why study evolution?. Evolutionary concepts provide a solid foundation to much of modern biology. - . you can’t fully understand current trends in biology or you will have difficulty understanding evolution. Advanced Higher Biology. Miss A Aitken. What is Parental Investment?. Parental investment. is the use of resources by a parent to benefit future or existing offspring.. Being a parent is costly – not in money terms, but in the energy spent by the parent looking after and raising offspring.. Diversity and Evolution Of Living Organisms . The scientific theory of evolution is the . organizing . principle. of life science.. 2. The scientific . theory of . evolution is supported . by . multiple forms. . 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.