Bio 1001 Lecture 5 Notes

Bio 1001 Lecture 5 Notes - Bio 1001 Tom Haffie LECTURE 5...

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Bio 1001 Tom Haffie LECTURE 5 Lamarck Principles of use and disuses --> giraffes neck stretches Inheritance of acquired traits --> offspring long necks Darwin Natural selection; 1) Variation 2) Heritability 3) Differentiated Reproduction 4) Genotype Change Descent by modification --> Evidence: 1. Homologies - structural or developmental similarities between species --> aren't explained by species environment Genetic code/ amino acids, embryo development, Pentadactyl Limbs 2. Vestigial traits - functionless traits --> came from ancestral species 3. Direct observation --> AZT resistance (viruses) --> antibiotic resistance (bacteria) 4. Intermediates in fossil record --> shows speciation and gradualism --> fossil record as evidence for evolution
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Unformatted text preview: Theories for Fossils: Gradualism + uniformitarianism (same process today as in past), catastrophism Hard to form: 1) preserves HARD structures; 2) geological shifting dmg; 3) loc that sediments accumulate ( p =F/A ) Fossil Record: >>1) relative age-> sediment build up -> youngest fossils on top >>2) Absolute age: isotope calculation i.e. C-14 left --> [ 公式 ] Scientific Theory --> coherent set of hypothesis --> falsifiable Theory of Evolution --> broad, organized collection of hypothesis 1) Common ancestry >> 2) gradualism >> 3) speciation >> 4) Natural Selection 5) Evolution happens ([ 公式 ]allele frequencies) Adaptive vs. no adaptive selection --> non = genetic drift, sexual selection...
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