Ch 17 Classification Taxonomy science of classifying organisms

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Ch. 17 Classification • Taxonomy – science of classifying organisms. – Taxonomist = someone

Ch. 17 Classification • Taxonomy – science of classifying organisms. – Taxonomist = someone who classifies organisms. • Aristotle – Greek scientists (300 B. C. ) – First taxonomist

• The 1 st classification was based on where the organism lived. –

• The 1 st classification was based on where the organism lived. – 1. Air dwellers – 2. Land dwellers – 3. Water dwellers • Linnaeus – Swedish nautralist – Developed the Modern System of Taxonomy • 7 Levels of Classification

• What are they? • Kingdom – Phylum/Division – Class – Order –

• What are they? • Kingdom – Phylum/Division – Class – Order – Family – Genus – Specific Epithet • Binomial Nomenclature – Genus & Specific Epithet – Underline both • Canis familiaris (dog)

Why use scientific names? • 1. Used worldwide – Written in latin (dead language)

Why use scientific names? • 1. Used worldwide – Written in latin (dead language) • 2. Avoid common name confusion • 3. Both are underlined for easy recognition.

Human Classification • Kingdom: Animalia • Phylum: Chordata • Class: Mammalia • Order: Primates

Human Classification • Kingdom: Animalia • Phylum: Chordata • Class: Mammalia • Order: Primates • Family: Hominidae • Genus: Homo • Specific Epithet: sapiens

5 Kingdoms • 1. Animalia • 2. Plantae • 3. Protista • 4. Fungi

5 Kingdoms • 1. Animalia • 2. Plantae • 3. Protista • 4. Fungi • 5. Monera

• Phylogeny – evolutionary history of a species • Phylogenetic tree – diagram

• Phylogeny – evolutionary history of a species • Phylogenetic tree – diagram that shows the evolutionary relationship among organisms. • Dichotomous key – set of choices that leads to the name of the organism – Key out an organism according to its characteristics.

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