Chapter_26_Learning_Objectives - Concept 26.3 Shared...

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Learning Objectives Chapter 26: Phylogeny and the Tree of Life Concept 26.1: Phylogenies show evolutionary relationships Explain the following characteristics of the Linaean system of classification: o Binomial nomenclature o Hierarchical classification List the major taxonomic categories from most to least inclusive. Explain how the hierarchical classification system can mirror phylogenetic relationships among organisms Concept 26.2: Phylogenies are inferred from morphological and molecular data Explain why it is crucial to distinguish between homology and analogy. Explain why bird and bat wings are homologous as vertebrate forelimbs, but analogous as wings. Define molecular systematics. Explain some of the problems that systematists may face in carrying out molecular comparisons of nucleic acids.
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Unformatted text preview: Concept 26.3: Shared characters are used to construct phylogenetic trees • Define a clade. Distinguish between a monophyletic clade and paraphyletic and polyphyletic groupings of species. • Distinguish between shared ancestral characters and shared derived characters. • Explain how shared derived characters can be used to construct a phylogenetic diagram. • Explain how outgroup comparison can be used to distinguish between shared ancestral characters and shared derived characters. Concept 26.4: An organism’s evolutionary history is documented in its genome • Distinguish between orthologous genes and paralogous genes. Explain how gene duplication has led to families of paralogous genes....
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This note was uploaded on 04/03/2012 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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