1. Wake-up
Make 2 observations about the diagram below. Make sure that it has to do with the animals, not the design of the diagram.

2. Cladograms
Christopherson

3. Define: Cladistics/Phylogeny
Evolutionary history of organisms

4. Cladogram/Phylogenic Trees
Diagram representing evolutionary relationships

5. How to Read a Cladogram

6. How to Make a Cladogram #1
Group organisms by shared characteristics; often provided

7. How to Make a Cladogram x x x x x x x x x x Characteristics Shark
Bullfrog
Kangaroo
Human
Vertebrate
Two pairs of limbs
Mammary glands
Placenta x x x x x x x x x x

8. How to make a Cladogram #2
Draw a Venn diagram; start with large circle for the characteristic that ALL organisms share and work in to more specific

9. Placenta
Mammary Glands
2 Limbs
Vertebrate

10. How to make a Cladogram #3
Construct a cladogram; lines represent organisms; characteristics in between the organisms

11. Human Kangaroo Bullfrog Shark
Placenta
Mammary Glands
Pairs of Limbs
Vertebrate

13. Activity: Creating a Cladogram