PPT-Chapter 4 Evolution and Biodiversity

Chapter Overview Questions How do scientists account for the development of life on earth What is biological evolution by natural selection and how can it account for the current diversity of organisms on the earth. The complexity and rich diversity of life found in forests provides many vital services to human beings Nonetheless humans are destroying forest biodiversity at an alarming rate The conversion of forests to agricultural land overgrazing unsustainabl The Processes and. Outcomes of Evolution. What process do you think produce the biodiversity of life on Earth? . Microevolution. is evolution on a small scale, and it results in changes in the proportion of genes in a population.. Do Now. Turn in Chapter 3 Homework. Turn in Ocean Acidification Lab. Look at the ‘Terms to Know’ from your Chapter 4 Study Guide and cross off any words that you already know. Objective. I can explain how nonnative species can change the ecosystem that they invade using the example of cane toads in Australia.. Section 1: The Theory of Evolution by Natural Selection. Darwin Proposed a Mechanism for Evolution. In 1859, the English naturalist Charles Darwin published convincing evidence that species evolve, and he proposed a reasonable mechanism explaining how evolution occurs.. It is the variety of all the different living things and their homes on the planet. . BIO. . DIVERSITY. Bio= biological organisms . -living things!. diversity= the amount of variation. Lecture 1. 1. Chapter 9 Software evolution. Topics covered. Evolution processes. Change processes for software systems . Program evolution dynamics. Understanding software evolution. Software maintenance. Case Study: Protecting Whales: A Success Story… So Far (1) . Cetaceans: Toothed whales and baleen whales. 8 of 11 major species hunted to commercial extinction by 1975. 1946: International Whaling Commission (IWC). 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.. Biodiversity. Proper Use of the . Compound Microscope. A Survey of Biodiversity. First Order of Business: . Proper use of the compound microscope. Practice . identification and counting techniques.. Module 14 . The . Biodiversity of Earth. After reading this module you should be able to. understand . how we estimate the number of species living on Earth.. quantify . biodiversity.. describe . patterns of relatedness among species using a . 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 . What is . Biodiversity. ?. It is the variety of earth’s species, the genes they contain, the ecosystems in which they live, and the ecosystems processes such as energy flow and nutrient cycling that sustain all life.. Origins of Life on Earth. 4.7-4.8 Billion Year History. Evidence from chemical analysis and measurements of radioactive elements in primitive rocks and fossils. . Life developed over two main phases:. After reading this module you should be able to. Identify . the processes that cause genetic diversity.. E. xplain . how evolution can occur through artificial selection.. E. xplain . how evolution can occur through natural selection..