Transcript Chapter 13 Section 2

Evidence of Evolution
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Preserved or mineralized remains or imprint
of an organism
Found in sedimentary rock
Shows, what some to believe are,
intermediates between current species
Archaeopteryx
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Vestigal Structures
◦ Structures with little or no know use
 Appendix, whale pelvis, eyes in blind cave salamanders
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Homologous
Structures
◦ Similar design in
structures that now
have different
functions
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Proteins such as hemoglobin are similar in
closer related species
DNA is closely related to protein production,
thus in species with a common ancestor
share more DNA similarity
DNA similarities parallel the proposed
ancestry based on anatomy and the fossil
record
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Through artificial selection we have created
organisms that look and act differently than
distant ancestors
◦ Dogs
◦ Cats
◦ Cattle
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If we can do it artificially could it happen
naturally?