1 / 14

Chapter 18 Classification

Chapter 18 Classification. The diversity of life. Why is it necessary to classify?. 1.5 million species on the planet so all creatures must be organized with a universal system. We call this taxonomy . Scientists cannot use common names because they change depending on where you live.

collinsjennifer
Download Presentation

Chapter 18 Classification

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. Chapter 18 Classification The diversity of life

  2. Why is it necessary to classify? • 1.5 million species on the planet so all creatures must be organized with a universal system. We call this taxonomy. • Scientists cannot use common names because they change depending on where you live. For example: cougar, panther, puma, mountain lion all represent the same animal. It has a scientific name – Felisconcolor

  3. Scientific Names • Carolus Linneaus – Swedish botanist who began the modern naming system. • Developed a two word naming system called binomial nomenclature (latin) • 2 name naming system • Scientific names are • Descriptive • In Latin • 2 words – capitalize the first letter of the first word and lowercase everything else. • First word is Genus second word is species Ursus maritimus

  4. Examplesscientific name = genus + species • Homo sapien • Canis familiarius • Felis domesticus • Drosophilia melanogaster Human Dog Cat Fruit fly

  5. Classification System • We organize all life on Earth into 9 levels. Each level is called a taxon. • Domain is the largest – 3 large groups (see below) • Species is the smallest

  6. Classification LevelsExample: Grizzly bear

  7. Human Taxonomy Levels

  8. Changing Number of Kingdoms History of Kingdoms: • 1700’s - 2 kingdoms –Plants and Animals • 1800’s – 3 kingdoms – Plants, Animals, Protists (pond water critters) • 1950’s – 5 kingdoms – Monera (bacteria), Protists, Fungi, Plants and Animals • 1990’s – 6 kingdoms - Eubacteria, Archaebacteria, Protists, Fungi, Plants and Animals.

  9. Section 18-3 Kingdoms and Domains • Shown below are the three domains and the 6 modern kingdoms we use today.

  10. Domain: Bacteria and Archaea • 2. Kingdom: Archaebacteria • Live in extreme environments • Cell wall lacks peptidoglycan 1. Kingdom: Bacteria • unicellular • prokaryotic • cell wall contains a special molecule called peptidoglycan.

  11. Domain Eukarya3. Kingdom Protista • Eukaryotic organisms (most are one celled) • Shows the greatest variety of organisms • Photosynthetic or heterotrophic

  12. Domain Eukarya4. Kingdom Fungi • Absorptive heterotrophs – absorb nutrients through their bodies • Feed on dead or decaying organic matter • Many are multicellular • Yeast is unicellular

  13. Domain Eukarya5. Kingdom Plantae • Multicellular • Autotrophs (do photosynthesis) • Cellulose in cell wall

  14. Domain Eukarya 6. Kingdom Animalia • Multicellular • Heterotrophic • Eukaryotic • Invertebrates and Vertebrates

More Related