bio 315 chapter 10

bio 315 chapter 10 - Chapter 10: Principles of...

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Chapter 10: Principles of Classification Taxonomy – the science of the classification of organisms Purpose – to show evolutionary relationships between groups & to provide a means of identifying organisms Two Methods of Classification Most scientists favor a PHYLOGENETIC classification scheme; this reflects the actual ancestry (evolutionary relationships) between different organisms Phenetics is an alternative method, in which classification of organisms is based solely on observable characteristics, and the goal is more practical – Identification and common language. The Five-Kingdom System Monera – unicellular prokaryotes (bacteria) Protista – unicellular eukaryotes (protozoa, algae) Fungi – multicellular heterotrophs with external digestion (yeasts, molds, mushrooms) Plantae – multicellular autotrophs (plants) Animalia – multicellular heterotrophs with internal digestion (animals) The 3 Domains Domain – considered to be a new level apart from Kingdom, based on the fact that cells are really of 3 fundamental types: o Eukarya (eukaryotes) o Bacteria (most bacteria) o Achaea (archaebacteria) – no peptidoglycan in cell walls, extreme environments & strange
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This note was uploaded on 04/07/2008 for the course BIO 315 taught by Professor Schmidt during the Spring '08 term at SUNY Stony Brook.

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bio 315 chapter 10 - Chapter 10: Principles of...

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