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Evidence for Evolution By Diana L. Duckworth Rustburg High School Campbell County
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Comparative Anatomy Evidence of common ancestry – same groups of bones. Homologous Structures http://encarta.msn.com/media_461553540_761554675_- 1_1/analogous_and_homologous_structures.html
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Vestigial Structures Homologous bones or organs that are no longer functional Humans – cocyx (tail bone); appendix; ear muscles; wisdom teeth; body hair; eyebrows; eye lashes; tonsils http://www.iss.k12.nc.us/schools/shs/jmccartney/natsel.html
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Homologous Embryology Early development is same for many organisms; evidence of common ancestry. http://apbio12007.blogspot.com/2007/09/evidence-of-evolution-by-natural.html
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Fossil Evidence Excellent lineages of –Horses –Pigs –Whales Two types of patterns visible: –Gradualism – directional selection produces gradual change over long time period –Punctuated Equilibrium – rapid evolution in short bursts separated by long periods of stasis Rapid evolution – directional or disruptive selection Stasis – stabilizing selection
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http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/evolution/evolutionrev4.shtml http://evolution.berkeley.edu/evosite/evo101/VIIAPaceevolution.shtml Horse evolutionWhale evolution
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From one Class to Another http://www.talkorigins.org/faqs/comdesc/section1.html Mammal, adapted for chewing & tearing Mammal-like reptile Reptile, adapted for gulping Note differences in body position http://bookingnwguides.com/BigGame/canada/lynxhuntingguidescanada.htm http://mgonline.com/iguana.html
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From a reptilian skull to a mammal- like reptile to a mammalian skull; well documented transitions in fossil record. http://www.bringyou.to/apologetics/p15.htm
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Mammal-like reptiles;body Type – reptile; skull mammalian Internal structure of bones indicative of endothermy – warm blooded. http://faculty.plattsburgh.edu/thomas.wolosz/pre-dino.htm
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