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Add to table of contents: • Embryology Pg. 62 • Evidence of Evolution Pg. 63 Evidence of Evolution Pg. 63 1) Adaptations – traits that help an organism survive. Look at the picture above. What are some adaptations of this bass? 2) Homologous structures = Similar structures that can have different functions. • They tell us about the history of the species. (common ancestor) Salamander, Lizard, Turtle, and Opossum Salamander, Lizard, Turtle, and Opossum 3) Analogous Structures = Similar in function but are different in structure. ( shows no common evolutionary origin – ex bird and fly wings) 4) Vestigial structures = No known function but was probably useful to an ancestor. Examples of Vestigial Structures: Appendix in a human. Ear muscles. Wisdom teeth. Muscles to make hair stand up. Human tailbone. Eyes on blind cave fish. 5) DNA(Moleucular biology)similarity and differences. • CAT TAC DNA is made of the same building blocks just in a different order –DNA in a human could be • AATGGGCCC • TTACCCGGG –DNA in a tree could be • AAGTTTAGC • TTCAAATCG 6) Embryos-show how animals are related by common ancestry, but developed different structures. – Earliest stage of growth and development in both plants and animals • Very similar embryo’s in Fish, Reptiles, Birds, and Mammals 7. Biogeography-Study of plants & animals over Earth’s surface. -Compares modern organisms to the fossils found there. 8) Fossil Record-shows evolution