systematics

systematics - Understanding Diversity Systematics Learning...

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Understanding Diversity Systematics
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Learning Objective 1 Why do scientists use scientific names and classifications of organisms?
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Classifying Organisms Classifications help biologists organize their knowledge Classification assigning organisms into groups based on similarities or relationships
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Scientific Names Allow biologists with different languages to communicate about organisms Biologists in distant locations can be certain they study the same (or different) organisms
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Classifying Organisms Systematics Scientific study of diversity of organisms and their evolutionary relationships Taxonomy Branch of systematics Naming, describing, classifying organisms
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Learning Objective 2 What is the binomial system of naming organisms? Arrange the Linnaean categories in hierarchical fashion, from most inclusive to least inclusive
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Binomial System of Nomenclature Used by biologists to name organisms Developed by Linnaeus, mid-18 th century Basic unit of classification: species
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Binomial System of Nomenclature Each species name has two parts: Genus name specific epithet
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Taxa Hierarchical system of classification Domain Kingdom Phylum Class Order Family Genus Species
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Classification
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Fig. 23-1, p. 485 DOMAIN Eukarya KINGDOM Animalia PHYLUM Chordata CLASS Mammalia ORDER Carnivora FAMILY Felidae GENUS Felis SPECIES Felis catus
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KEY CONCEPTS Biologists name organisms using a binomial system (each species has a genus name followed by a specific epithet) Biologists classify organisms in taxonomic categories arranged in a hierarchy from most inclusive (domain) to least inclusive (species)
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Binomial Nomenclature Genus + specific epithet Homo sapiens or Homo sapiens Quercus alba or Quercus alba Linnaeus, mid-18 th century Facilitates international science
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Taxonomic categories Domain Kingdom Phylum Class Order Family Genus Species
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KINGDOM PHYLUM CLASS Chordata Mammalia Animalia
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ORDER FAMILY GENUS SPECIES Carnivora Felidae Felis Felis catus
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Learning Objective 3 What are the six kingdoms and three domains of organisms? Give rationales for and against this system of classification
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Common ancestor of all living organisms Domain Archaea Domain Eubacteria (bacteria) Domain Eukarya
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Tree of Life
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Six-Kingdom Classification Six-Kingdom Classification Archaea Archaea Prokaryotes Prokaryotes Bacteria Bacteria Prokaryotes Prokaryotes Protista Protista Unicellular, aquatic eukaryotes Unicellular, aquatic eukaryotes
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Six-Kingdom Classification Six-Kingdom Classification Fungi Fungi Molds, yeasts, and mushrooms Molds, yeasts, and mushrooms Plantae Plantae Multicellular eukaryotes Multicellular eukaryotes Animalia Animalia Multicellular eukaryotes Multicellular eukaryotes
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Six-Kingdom Classification Six-Kingdom Classification
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Three-Domain Classification Three-Domain Classification Archaea Archaea Prokaryotes
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This note was uploaded on 06/23/2011 for the course BIO 112 taught by Professor Dr.dertein during the Spring '11 term at St. Xavier.

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systematics - Understanding Diversity Systematics Learning...

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