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BIOL 204 Lecture 8 Outline - Phylogeny & Tree of Life.doc

BIOL 204 Lecture 8 Outline - Phylogeny & Tree of...

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BIOL 204 – Principles of Organismal Biology Lecture Outline 8 – Phylogeny & Tree of Life Learning Objectives: Distinguish between allopatric and sympatric speciation Distinguish between vicariance and dispersal What is taxonomy and why is it important? Recognize and employ binomial nomenclature Define taxon , clade , and sister taxa What is the difference between homology and homoplasy ? Differentiate between monophyletic and paraphyletic groups Identify the contributions of Carl Linnaeus and Willi Hennig Define and identify a synapomorphy I. Speciation a. Speciation is the process by which new species arise i. Species – group of interbreeding individuals of common descent that are reproductively isolated from other such groups b. Allopatric speciation – occurs in small populations that become physically isolated leading to reproductive isolation (most common mode) i. Dispersal – individuals migrate from one area to another ii. Vicariance
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