Part 2: Evidence from Comparative Anatomy  A second evidence for evolution is the presence of similar structures in organisms, which also share a similar form and embryonic origin. These structures are said to be homologous. If organisms share parts that only have similar function, but not origin or structure, they are said to be analogous.   The similarity of homologous structures results from their origin in the common ancestor. One of the most well studied examples is the pentadactyl limb, or forelimb, of vertebrates.  In figure 2 you can see each vertebrate has all seven bones organized in the same layout, only slightly modified as evolution led to changes in shape or sizes of the bones in each organism. The similarity of homologous structures is explained by descent from a common ancestor.      Screen Shot 2022-03-08 at 9.51.45 AM.pngFigure 3: Williams, Lana, “Homology Vertebrates” (2019). UCF Created OER Images. 82.  https://stars.library.ucf.edu/oer-images/82 licensed under CC BY-SA 4.0 

Evidence: Episode 3 Questions

Culture: Episode 10 Question

Compare the anatomy of a butterfly and a bird wing. What is the function of these structures? 

Compare the skeletal structure of each limb to the human arm. Relate the differences you see in form to the differences in function.

Evidence: Episode 1 Questions

Video Question Climate change is a short-term change in the Earth’s overall temperature with few ramifications.

Keeling’s reports from Mauna Loa demonstrated ________.

Should all eligible persons vote in the elections? 

A patient comes to the health nurse at the workplace with epistaxis. The patient reports frequent nosebleeds that have usually been controlled without intervention.Which assessmentwould be the most helpful after the nurse has stopped the bleeding?