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Understanding Evolution Through Fossils and Cladograms

This educational resource explores key concepts of evolution, fossils, and cladograms. It discusses how illustrations symbolizing evolution encapsulate the process of change in organisms over time. The definition and significance of fossils, the types of rocks that typically contain them, and their role in supporting evolutionary theory are examined. Additionally, the relationship between organisms and their fossil evidence is highlighted, as well as the use of cladograms to display evolutionary relationships among species. This engaging material is ideal for students and educators alike.

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Understanding Evolution Through Fossils and Cladograms

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  1. How does the illustration represent the term evolution? 2. What is a fossil? 3. What type of rock would you most likely find fossils? Warm-Up3/18 Write question & Answer! EQ: How does the fossil record support evolution?

  2. Which of these are most likely to be preserved as a fossil? a. leaf b. tooth c. hair 2. In a population of codfish, a scientist notes that some fish have larger fins than others. The differences among the traits of organisms in a population are known as a. variation b. evolution c. extinction Warm-Up3/19 Write question & Answer! EQ: How does the fossil record support evolution?

  3. What can the location of a fossil in a rock layer tell scientists about the organism? a. how long ago the organism lived b. that the organism is now extinct c. how many offspring the organism had d. the exact age of the fossil 2. Which layer contains the oldest fossils? Warm-Up3/20Write question & Answer! A B C

  4. Based on the branching diagram, which bird does not perch but can fly? What does the fossil record reveal? a. Only dinosaurs formed fossils. b. Species evolved over time. c. Few organisms are extinct. Warm-Up3/21Write question & Answer! EQ: How does the fossil record support evolution?

  5. Species 1 Species 2 Species 3 Species 4 Species 5 D C B A 7A Warm-Up3/22 Scientists often use data from the fossil record to construct cladograms that show the evolutionary relationships among species. The letters at the branching points represent a common ancestor of two species. Based on the cladogram, which of the following statements is true? a. Species 2,3, and 4 are all related to D. b. Species 5 is a descendent of ancestor B. c. Ancestor C is a descendent of ancestor D. d. Species 2 and 4 share D as a common ancestor. EQ: What is a cladogram? Answer Only!

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