1. Dichotomous Keys: a set of paired statements that describe physical characteristics of different organisms

2. ? ? ? ? ? ? ? Dichotomous Key: Name that potato chip!

4. Practice classifying North Carolina leaves, fish, and • norns (aliens!) by using the dichotomous keys in your • packet. Now it’s Your Turn to Practice using a dichotomous key!! fish Norn NC Leaf

5. CLADOGRAMS: a diagram that shows evolutionary relationships among organisms. Based on PHYLOGENY: the evolutionary history of a species Doesn’t focus only physical characteristics, looks at evolutionary history instead Cladograms can also be called phylogenetic trees.

6. Derived traits are characteristics or features that are found in later organisms but not in earlier ones. Derived traits are represented as small tick marks on a cladogram with the name of the trait next them. DERIVED TRAITS traits = Characteristics • Organisms closer to one another on the tree share a more recent ancestor than the ones farther away from each other.

7. Practice

8. Practice

9. Practice

10. Practice

11. Practice

12. Practice

13. Practice

14. You can also use this table to construct a cladogram! • To help you, you can make a venn diagram. Hagfish perch salamander lizard pigeon mouse chimp

15. Now you can use your venn diagram to fill out the cladogram: chimp salamander perch hagfish lizard mouse pigeon feathers Fur;MammaryGlands Claws or Nails Lungs Jaws Hagfish perch salamander lizard pigeon mouse chimp