Morphology and Evolution

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Presentation transcript:

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.

Which is most closely related to Alligators? A. Lizard B. Bird C. Bat

Which animal is most closely related to whales? A. Hippo B. Walrus C. Shark

Which animal is most closely related to the wolverine? A. Tasmanian Devil B. Rhino C. Walrus

Which animal is most closely related to rhinos? A. Walrus B. Hippo C. Zebra

Which is most closely related to Alligators? A. Lizard B. Bird Proteins, Fossils C. Bat

Hippos are most closely related to whales. A. Hippo DNA, Fossils B. Walrus C. Shark

Walruses are most closely related to wolverines. A. Tasmanian Devil B. Rhino Placental carnivores C. Walrus

Zebras are most closely related to rhinos. A. Zebra Odd-toed ungulates A. Walrus B. Hippo

Arrange the animals listed below on the cladogram. Alligator Shark Hippo Zebra Bird Whale Tasmanian Devil Rhino

Tasmanian Devil Alligator Shark Whale Bird Hippo Zebra Rhino

Pikaia 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). Alligator Shark Whale Hippo Zebra Rhino Bird T. Devil Pikaia Even # Toes Whales and Hippos both descended from a common ancestor that had an even number of hoofed toes.

Possible Solutions Pikaia T. Devil Alligator Whale Hippo Zebra Rhino Shark Whale Hippo Zebra Rhino Bird T. Devil Pikaia Even Toes Odd Toes Shelled eggs Diapsid skull Hooves Live Birth Fur/Hair Synapsid skull Legs Jaws