1 / 10

Classification of Living Things Ch. 18

Classification of Living Things Ch. 18. Mrs. Griffin. Before we begin……. What is the scientific name for the human species? Homo sapiens What do you think the common names for Felis catus and Canis familiaris ? Cat, dog In each case, what does the first of the two names refer to?

viola
Download Presentation

Classification of Living Things Ch. 18

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Classification of Living ThingsCh. 18 Mrs. Griffin

  2. Before we begin…… • What is the scientific name for the human species? • Homo sapiens • What do you think the common names for Felis catus and Canis familiaris? • Cat, dog • In each case, what does the first of the two names refer to? • The genus • What do the two names together refer to? • The species • Which group is more inclusive? • Genus.

  3. Before we begin… • To study the diversity of life, biologists use a classification system to name organisms and group them in logical order. • The science of classifying organisms and assigning each organism a universally excepted name is known as taxonomy. • One tool used to identify unfamiliar organisms is a dichotomous key…. Vocabulary to know: taxonomy, binomial nomenclature, genus, taxon, family, order, class, phylum, kingdom, cladogram, the three domains and six kingdoms.

  4. Early classification systems • “Oak with deeply divided leaves that have no hairs on their undersides and no teeth around their edges.” • Explained in great detail, very long. • Carolus Linnaeus- Swedish botanist developed two-word naming system (binomial nomenclature). • Linnaeus’s hierarchical system of classification included seven levels. From largest to smallest- kingdom, phylum, class, order, family, genus and species.

  5. Binomial Nomenclature • Developed by Linnaeus • Two-name system. The scientific name is always written in italics, the first word is capitalized, and the second word is lowercased. • First name (genus); second name (species)

  6. Includes 7 levels: Kingdom Phylum Class Order Family Genus Species Linnaeus’s system of classification

  7. Linnaeus’s system of classification, Figure 18-5 • Does the coral snake belong in the Phylum Chordata and the Kingdom Animalia? • Yes • Does the Albert Squirrel belong in the Family Ursidae? • No • Remember- broad to specific (starting from the top down to the bottom).

  8. Classification using cladograms Points where characteristics arose. Characteristics that appear in recent parts of a lineage but not in its older members are called derived characteristics. These characteristics can be used to construct a cladogram.

  9. Kingdoms and Domains

  10. Let’s Review • What is classification? • Why is classifying living things important? • What is taxonomy? • Describe binomial nomenclature and how are scientific names written? • Linnaeus’s hierarchical system of classification included seven levels, what are they?

More Related