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BIOA01H3 (698)
Lecture

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Department
Biological Sciences
Course
BIOA01H3
Professor
Mark Fitzpatrick
Semester
Winter

Description
Fossil Record -Physically preserved organism from ancient rocks or amber -Used to see them change over time from old fossils Limitations: -Dead organisms decay -Rocks inaccessible -Destroyed by erosion -Analyze bones, teeth, skin, and feather -Used for comparing anatomy. Whale Evolution: -Descendants from aquatic wolf from land animals -Had a wolf like skull, ear, pelvis bone, and structures to facilitate 4 legs Vestigial Structures -Physical structures with no function -Suggests an evolutionary past Human vestigial features -Ear-wiggling muscles -Tail bone in human and embryos -Appendix structure -Wisdom molar teeth -When people used to eat vegetables, they needed to chew harder, so there were molar teeth that helped that -When people used to eat vegetables, it took more digestion. Now, there’s less digestion required, so the intestines shrunk, and the Appendix is the remaining piece that dangles down Homologous Structures -Structures with similar organization and function -Su
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