Notes 18.1

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Notes 18.1

• Classification

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Why Classify?

• To study the diversity (variety) of life,
  biologists use a classification system to name
  group organisms.
• Taxonomy Putting organisms into categories
• Carl Linneaus --- Developed classification system
  Naming system
• Grouped or ranked organisms from most general to
  most specific

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Assigning Scientific Names

• Needed an international naming system
• There are often several words for the same object
• Example --- Cool --- Temperature or excellent
• Linnaeus decided to create a system for naming
• Called this system Binomial Nomenclature or the
  2-name naming system

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Naming Continues

• An organisms scientific name consists of 2 parts
  --- the genus and species
• The genus part is like your first name
• The species part is like your last name
• Example ---- Grizzly bear Common name
• Ursus genus name is capitalized
• arctos species name not capitalized
• Both need to be underlined or written in italics

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7 Levels to Linnaeus System

• Kingdom --- Most general
• Phylum --- Kingdoms divided
• Classes
• Orders
• Family
• Genus
• Species --- Most specific
• Each level is called a taxon

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7 Levels for Grizzly Bear

• Kingdom Animalia
• Phylum Chordata
• Class Mammalia
• Order Carnivora
• Family Ursidae
• Genus Ursus
• Species arctos