Domains and kingdoms (2)

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An introduction to the classification system of living things. Appropriate for 6th and 7th grade students.

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Domains and kingdoms (2)

  1. 1. Classification System
  2. 2. How are organisms classified TODAY? <ul><li>All living things are classified into one of three domains: </li></ul><ul><ul><li>Bacteria </li></ul></ul><ul><ul><li>Archaea </li></ul></ul><ul><ul><li>Eukarya </li></ul></ul>
  3. 3. Bacteria <ul><li>These organisms have 3 basic characteristics: </li></ul><ul><ul><li>They are unicellular. </li></ul></ul><ul><ul><li>They are prokaryotic. </li></ul></ul><ul><ul><li>They live everywhere around us: </li></ul></ul>On the things we touch In the air In our skin
  4. 4. Archaea <ul><li>These organisms have 3 basic characteristics: </li></ul><ul><ul><li>They are unicellular. </li></ul></ul><ul><ul><li>They are prokaryotic. </li></ul></ul><ul><ul><li>They live in Earth’s most extreme environments: </li></ul></ul>Underwater volcanoes Geysers Hot springs
  5. 5. Archaea <ul><li>These environments are too extreme for any other organism on Earth because they’re: </li></ul><ul><ul><li>Too hot </li></ul></ul><ul><ul><li>Too acid or alkaline </li></ul></ul>
  6. 6. So, how are bacteria and archaea similar but different?
  7. 7. Eukarya <ul><li>Organisms in this domain have only 1 thing in common: </li></ul><ul><ul><li>They are eukaryotes </li></ul></ul>
  8. 8. Eukarya There are 4 types of eukaryotic organisms (also known as kingdoms)
  9. 9. Fungi <ul><li>These organisms have 3 basic characteristics: </li></ul><ul><ul><li>They’re heterotrophs </li></ul></ul><ul><ul><ul><li>Most of them feed from dead organisms </li></ul></ul></ul><ul><ul><li>They’re multicellular </li></ul></ul><ul><ul><ul><li>Only few fungi species are unicellular </li></ul></ul></ul><ul><ul><li>They’re eukaryotes </li></ul></ul>Mushrooms Mold Mildew
  10. 10. Plants <ul><li>These organisms have 3 basic characteristics: </li></ul><ul><ul><li>They’re autotrophs </li></ul></ul><ul><ul><ul><li>They produce their own food through photosynthesis </li></ul></ul></ul><ul><ul><li>They’re multicellular </li></ul></ul><ul><ul><li>They’re eukaryotes </li></ul></ul>Flowering plants Moss Trees
  11. 11. Animals <ul><li>These organisms have 3 basic characteristics: </li></ul><ul><ul><li>They’re heterotrophs </li></ul></ul><ul><ul><li>They’re multicellular </li></ul></ul><ul><ul><li>They’re eukaryotes </li></ul></ul><ul><ul><li>They move </li></ul></ul>Sea stars Insects Vertebrates
  12. 12. Protists <ul><li>These organisms have only 2 things in common: </li></ul><ul><ul><li>They’re heterotrophs </li></ul></ul><ul><ul><li>They can’t be classified as plants, animals or fungi. </li></ul></ul>Seaweed Amoeba Slime mold
  13. 13. So now you know it! This is what our modern classification system looks like:

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