Practicing Evolutionary Relationships

Practicing Evolutionary Relationships
Below are some examples of phylogenetic trees drawn in different ways.
Three examples of phylogenetic trees demonstrating the same evolutionary relationship between species A, B, C, D, and E.
1. Pick one tree and clearly label the root. Clearly label one branch. Use an arrow to signify which direction time flows.
2. What do the letters A-E represent?
3. Do all three trees depict the same phylogenetic relationships? Yes No
4. What does the red node signify?
5. Which lived more recently in time, the common ancestor of species A and B or the common ancestor of species B and D?
Phylogenetic tree with 6 species and 5 nodes with characteristics.
6. Use the above tree to answer the following questions:
a. Pakicetus was a freshwater carnivore that nursed underwater. T F
b. The Blue whale is most closely related to the Dorudon. T F
c. All animals in this tree are carnivores. T F
7. On the above tree, which trait arose first?
a) underwater nursing
b) loss of external hind legs
c) the hippo
d) there’s not enough information to answer this question
8. Explain your reasoning for your answer in question 7.
Phylogenetic tree representing 5 species of Carnivora.
9. Next to the above tree, place the following labels: Order, Family, Genus, Species
10. Which animals are the most closely related?
a) the otter and skunk
b) the domestic dog and wolf
c) the leopard and skunk
d) the leopard and wolf
11. How do you know?
12. On the above tree, please draw a new branch for the Florida Panther, Puma concolor coryi. Be sure to properly label your new addition.
13. Using the information in the table below, draw your own tree. Be sure to list both the species (at the top) and the trait that unites them (at the node).

 Skin coveringVertebrateBreathing apparatus
Ray-Finned FishNo hairYesSwim bladder
FrogNo hairYesLungs

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