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Chapter 17.1

Chapter 17.1. Classification. Section 17.1 Summary – pages 443-449. Classification of Living Things. Classification—the grouping of objects or information based on similarities. Taxonomy - branch of biology that groups and names organisms based on studies of their different characteristics.

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Chapter 17.1

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  1. Chapter 17.1 Classification

  2. Section 17.1 Summary – pages 443-449 Classification of Living Things • Classification—the grouping of objects or information based on similarities. • Taxonomy - branch of biology that groups and names organisms based on studies of their different characteristics.

  3. Section 17.1 Summary – pages 443-449 Bbinomialnomenclature • Binomial nomenclature = two-word naming system to identify species (developed by Carolus Linnaeus.) • First word = genus of the organism. • Second word = specific epithet. • The scientific name for each species is thus a combination of the genus name and specific epithet.

  4. Section 17.1 Summary – pages 443-449 Scientific and common names • Scientific names should be italicized in print and underlined when handwritten. • First letter of the genus name is uppercase; first letter of the specific epithet is lowercase. Example: Drosophila melanogaster

  5. Section 17.1 Summary – pages 443-449 Why not use common names? • Common names can be misleading. For example, a sea horse is a fish, not a horse. • Also, it is confusing when a species has more than one common name.

  6. Section 17.1 Summary – pages 443-449 Dichotomous keys • Dichotomous keys - sets of numbered statements used to identify unknown organisms. • Each set deals with a single characteristic of an organism, such as leaf shape.

  7. Section 17.1 Summary – pages 443-449 Taxonomic rankings • A group of organisms is called a taxon. • Species - the smallest taxon is species. What defines a species? • Genus—a group of similar species that have similar features and are closely related.

  8. Section 17.1 Summary – pages 443-449 Taxonomic rankings • Compare the appearance of a lynx, Lynx canadensis, and a bobcat, Lynx rufus. Bobcat Lynx

  9. Section 17.1 Summary – pages 443-449 Domain Eukarya Kingdom Animalia Chordata Phylum Class Mammalia Carnivora Order Felidae Family Lynx Genus Species Lynx rufus Lynx canadensis

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