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CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME.

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Presentation on theme: "CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME."— Presentation transcript:

1 CHAPTER 13: THE ENVIRONMENT AND CHANGE OVER TIME

2 LESSON 2:THEORY OF EVOLUTION BY NATURAL SELECTION

3 Essential Questions  Who was Charles Darwin?  How does Darwin’s theory of evolution by natural selection explain how species change over time?  How are adaptations evidence of natural selection?

4 Vocabulary  Naturalist  Variation  Natural Selection  Adaptation  Camouflage  Mimicry  Selective Breeding

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 Camouflage  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 Write down questions and answers Workbook page


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