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Classification of Organisms Chapter 17. Biodiversity Biodiversity – the variety of organisms considered at all levels from populations to ecosystems.

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Presentation on theme: "Classification of Organisms Chapter 17. Biodiversity Biodiversity – the variety of organisms considered at all levels from populations to ecosystems."— Presentation transcript:

1 Classification of Organisms Chapter 17

2 Biodiversity Biodiversity – the variety of organisms considered at all levels from populations to ecosystems.

3 Taxonomy Taxonomy – the science of describing, naming, and classifying particular organisms. Taxon – a particular group within the taxonomic system.

4 The Linnaean System Developed by naturalist Carolus Linaeus Grouped organisms according to their form and structure (morphology) Organisms are grouped by similarities.

5 Levels of Classification Domain Kingdom Phylum Class Order Family Genus Species

6 King Philip Came Over For Good Soup I H L R A E P N Y A D M N E G L S E I U C D U S R L S I O M Y E M S

7 Nomenclature Each species has a scientific name Binomial nomenclature – a two part name – Genus – Species Names come from Greek and Latin Written in italics Genus (first letter capitalized) species (lowercase) Examples: – Homo sapiens – E. coli

8 Systematics Phylogenetics – the analysis of evolutionary or ancestral relationships among taxa Cladistics – a system of phylogenetic analysis that uses shared and derived characters for grouping taxa

9 Shared character – a feature that all members of the group have in common Derived character – a feature that evolved only within the group under consideration Clade – the group of organisms that includes an ancestor plus all of its descendants

10 Domains Three domains: – Domain Bacteria – Domain Archaea – Domain Eukarya

11 Domains Bacteria – Small, single-celled prokaryotes – Cell walls, no nucleus Archaea – Prokaryotes – Live in extreme environments Eukarya – Eukaryotic organisms, have a nucleus – Complex, multicellular organisms

12 6 Kingdoms The next level of organization is Kingdoms There are 6 Kingdoms – Eubacteria – Archaebacteria – Animalia – Plantae – Fungi – Protista

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16 Classwork Read page Answer page 450 #s 1-5

17 Warm-up 1.What is taxonomy? Why bother to classify organisms? 2.What is the purpose of a scientific name? 3.What two taxa make up an organisms scientific name? How is this scientific name correctly written? 4.Write these scientific names correctly: – mola mola – homo sapians – tyrannosaurus rex


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