1. ACTIVITY 100: DNA: THE EVIDENCE WITHIN CHALLENGE  HOW DOES DNA PROVIDE EVIDENCE ABOUT HOW ANIMALS ARE RELATED? VOCABULARY: DNA CLASSIFICATION

2. GETTING STARTED  Read the Intro on Page F-51  Read the Scenario on Page F- 52  Copy the Chart into your Science Journal on F-52.

3. NUMBER OF DIFFERENCES BETWEEN DNA SEQUENCES Mammal # 1 (Dog) Mammal # 2 (Whale) Mammal # 3 (Horse) Reptile Fish Mammal # 1 X Mammal # 2 XX Mammal # 3 XXX

4. PART B Does every species within a class display every common characteristic for that class? Review Act. 76

5. NUMBER OF DIFFERENCES BETWEEN DNA SEQUENCES Fish Mammal # 1 Mammal # 2 Mammal # 3 Reptile Bird Kiwi Platypus Armadillo Fruit Bat

6. AQ # 2 Horse (Mammal) Trout (Fish) SeahorseLive YoungFins Gills Cold-Blooded UnderWater Scaly Skin 4/50/1

7. HOMEWORK: DUE TUES APRIL 1 ST (NOT A JOKE!) Analysis Question # 2: Would you expect the DNA of a seahorse to more like the DNA of a horse or the DNA of a trout (fish)? Use evidence from the activity to support your answer!