1. Cladograms Show phylogeny or EVOLUTIONARY
Raccoons
Lesser pandas
Giant pandas
Bears
Common Ancestor
Cladograms are sometimes called branching
diagrams
Show phylogeny or EVOLUTIONARY
HISTORY. Also called phylogenetic tree

2. Three purposes:
-show common ancestors
-show shared features
-show how closely one organism is related to another

3. The four descendents at the top of the tree are DIFFERENT species
The four descendents at the top of the tree are DIFFERENT species. This is called SPECIATION
Cladograms
Sharks
Frogs
Kangaroos
Humans
Placenta
Mammary glands
Four Limbs
Vertebrae
This diagram shows a relationship between 4 relatives. These relatives share a common ancestor at the root of the tree.
Common Ancestor
Note that this diagram is also a timeline. The older organism is at the bottom of the tree.

4. - Cladograms 1 2 3 4 Shark Frog Kangaroo Human Characteristics
Vertebrae
Four Limbs
Mammary glands
Placenta
Shark
YES NO
Frog
Kangaroo
Human 1 2 3 4

5. After which animal did mammary glands develop?
Analysis of cladogram
Glue/tape cladogram into lab book
After which animal did mammary glands develop?

6. What animal does not have jaws?

7. Which animals have lungs?

8. Which animals are probably predators?

9. After which animal did protection from the elements arise?

10. What other animals would come after the chimp?

11. Which animals would come before the hagfish?