BioEd Online Diversity of Life - Domain IV Part A: Biological Classification By Deanne Erdmann, M.S.
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Transcript of BioEd Online Diversity of Life - Domain IV Part A: Biological Classification By Deanne Erdmann, M.S.
BioEd Online
Diversity of Life - Domain IV
Part A: Biological
Classification
By Deanne Erdmann, M.S.
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Why Do We Classify Organisms? Biologists group organisms to
represent similarities and proposed relationships.
Classification systems change with expanding knowledge about new and well-known organisms.
Tacitus bellus
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Populus tremuloidesQuaking Aspen
Classification and Phylogeny Binomial Nomenclature Hierarchical Classification Systematics: Evolutionary Classification
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Carolus von Linnaeus(1707-1778)
Swedish scientist who laid foundation for modern taxonomy
Binomial Nomenclature Carolus von Linnaeus Two-word naming system
Genus Noun, Capitalized,
Underlined or Italicized Species
Descriptive, Lower Case, Underlined or Italicized
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Hierarchical Classification Taxonomic categories
Kingdom King Phylum Philip Class Came Order Over Family For Genus Green Species Soup
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Kingdoms and Domains
Bacteria Archaea Eukarya
Bacteria Archaea Protista Plantae Fungi Animalia
Monera Protista Plantae Fungi Animalia
The three-domain system
The six-kingdom system
The traditional five-kingdom system
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Systematics:Evolutionary Classification of Organisms Systematics is the study of the evolution of
biological diversity, and combines data from the following areas.
Fossil record Comparative homologies Cladistics Comparative sequencing of DNA/RNA among
organisms Molecular clocks
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Taxonomic Diagrams
Mammals Turtles Lizards and Snakes
Crocodiles Birds Mammals Turtles Lizards and Snakes
Crocodiles Birds
CladogramPhylogeneticTree
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Dichotomous Keys Identify Organisms Dichotomous keys versus evolutionary
classification Dichotomous keys contain pairs of contrasting
descriptions. After each description, the key directs the user to
another pair of descriptions or identifies the organism.
Example: 1. a) Is the leaf simple? Go to 2b) Is the leaf compound? Go to 32. a) Are margins of the leaf jagged? Go to 4b) Are margins of the leaf smooth? Go to 5
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Thank You This concludes a brief review of biological
classification. You may find additional information on this
section of Domain IV, The Diversity of Life, in the expanded content talks, and in the notes below each slide in the slide library.