Wednesday, Sept 20th, 2017 OBJ: SW explore homologous structures and similarities in early development. WU: What is homologous and analogous structures?

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Wednesday, Sept 20th, 2017 OBJ: SW explore homologous structures and similarities in early development. WU: What is homologous and analogous structures? Agenda: Finish fossil lab PP with Color the bones. HW: none

Homologous structures Body parts that are similar in position, structure and EVOLUTIONARY origin, but not function. Like the tetrapod limbs we look at yesterday.

Analogous Body parts that are similar in function, but NOT position, structure and EVOLUTIONARY origin

Bones shown in the same color are homologous The supports for the insect wings are not homologous with the bones of the bat or the bird wings.

In the fossil lab, we studied the morphology of the genus, Adventurian In the fossil lab, we studied the morphology of the genus, Adventurian. We look at how the structures evolved over millions of years.