Morphology and Evolution

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Morphology and Evolution

• Consider how these organisms are related.
• 2. Working in groups of two or three, arrange
  the images you were given. Organize them
  according to evolutionary relationships.

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Which is most closely related to Alligators?
A. Lizard
B. Bird
C. Bat
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Which animal is most closely related to whales?
A. Hippo
B. Walrus
C. Shark
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Which animal is most closely related to the
wolverine?
A. Tasmanian Devil
B. Rhino
C. Walrus
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Which animal is most closely related to rhinos?
A. Walrus
B. Hippo
C. Zebra
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Which is most closely related to Alligators?
A. Lizard
B. Bird
Proteins, Fossils
C. Bat
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Hippos are most closely related to whales.
A. Hippo
DNA, Fossils
B. Walrus
C. Shark
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Walruses are most closely related to wolverines.
A. Tasmanian Devil
B. Rhino
Placental carnivores
C. Walrus
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Zebras are most closely related to rhinos.
A. Zebra
Odd-toed ungulates
A. Walrus
B. Hippo
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Arrange the animals listed below on the cladogram.
Alligator Shark Hippo Zebra Bird Whale Tasmanian
Devil Rhino
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Tasmanian Devil
Alligator
Whale
Shark
Zebra
Hippo
Rhino
Bird
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Justify your arrangement by placing a
synapomorphy at each of the grey bars. A
synapomorphy is a feature that is not found in
animals that branch off prior to the node (
fork) on the diagram, but which all subsequent
animals share. Use Pikaia as your outgroup
(ancestral condition).
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Possible Solutions
Even Toes
Odd Toes
Shelled eggs Diapsid skull
Hooves
Live Birth Fur/Hair Synapsid skull
Legs
Jaws