CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME - PowerPoint PPT Presentation

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CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME

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CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME

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  1. CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME

  2. Lesson2:THEORY OF EVOLUTION BY NATURAL SELECTION

  3. ?? EssentialQuestions • Whowas Charles Darwin? • HowdoesDarwin’stheory of evolutionby natural selectionexplainhowspecieschangeover time? • How are adaptationsevidence of natural selection?

  4. Vocabulary • Naturalist • Variation • Natural Selection • Adaptation • Camouflage • Mimicry • SelectiveBreeding

  5. Charles Darwin • A naturalist is a person who studies plants and animals by observing them

  6. Charles Darwin • Voyage of the Beagle • The Galapagos Island • Tortoises • Mockingbirds and Finches

  7. Darwin’s Theory • Common Ancestors • Variations • A variation is a slight difference in an inherited traits of individual members of a species • Natural Selections • Is the process by which populations of organisms with variations that help them survive in their environments live longer, compete better, and reproduce more than those do not have the variations

  8. Adaptations • An adaptation is an inherited trait that increases an organism’s chance of surviving and reproducing in its environment • Types of Adaptations • Structural adaptation • Behavioral adaptation • Functional adaptation

  9. Adaptations • Environmental Interactions • Camouflage is an adaptation that enables a species to blend with its environment • The resemblance of one species to another species is mimicry

  10. Adaptations • Camouflage in war

  11. Artificial Selection • The breeding of organisms for desired characteristics is called selective breeding

  12. Classwork Page 478 #1-9 Writedownquestions and answers Workbook page 413 - 415