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Lecture

Chapter 19.docx

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Department
Biology
Course
BI111
Professor
Tristan Long
Semester
Winter

Description
Chapter 19SystematicsTwin goals of systematics reconstruction of evolutionary history and classification of species taxonomy the idea that we are able to define species and put them in a relationship that matches their evolutionary historyPhylogenetic trees come about through successive events of speciation branching in which one species is given rise to two or moreReconstructing these trees requires comparison of traits with shared genetic ancestry in multiple speciesHomologies are good analogies are notUse Characters to categorizeBinary nomenclature genus and species reflect the nested hierarchy of lifeTaxon designation has 3 componentsName what group does it belong toRank where does it fit into phylogenyContent relevant to species conceptResemblanceduetosimilarselectivepressuretofillnichehomoplastiesDolphinSharkIchtyosaur ResemblanceduetoRecentcommonancestorhomologies
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