Protoctists2

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Protists: an introduction to protozoa and algae for 12 year old students. It may contain errors, as English is not our native language

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Protoctists2

  1. 1. The kingdom of Protists Protozoa and Algae
  2. 2. They look diferent, but they belong to the same kingdom <ul><li>Protozoa </li></ul><ul><ul><li>Unicellular </li></ul></ul><ul><ul><li>Heterotrophic </li></ul></ul><ul><li>Algae </li></ul><ul><ul><li>Unicellular or pluricellular </li></ul></ul><ul><ul><li>Autotrophic </li></ul></ul>
  3. 3. Protozoa live... <ul><li>In fresh or sea water </li></ul><ul><li>In moist soil </li></ul><ul><li>Inside other organisms </li></ul>
  4. 4. Protozoa are heterotrophic. They can eat... <ul><li>Rotting material (saprophytes) </li></ul><ul><li>Bacteria, or other protozoa (predators) </li></ul><ul><li>Some feed on other organisms (parasites) </li></ul>
  5. 5. Protozoa move in a variety of ways. Watch it in Youtube <ul><li>Cillia – Paramecium </li></ul><ul><li>Pseudopodia – Amoeba </li></ul><ul><li>Immobiles – Plasmodium </li></ul><ul><li>Flagella – Trypanosoma </li></ul>
  6. 6. Watch out! Protozoa can be confused with bacteria, but... <ul><li>Bacteria – Prokaryote </li></ul><ul><li>Protozoa – Eukaryote </li></ul>Protozoa are about ten times bigger than bacteria, and they are more complex
  7. 7. Protozoa and human beings <ul><li>Some protozoa produce diseases in humans. Many times they are transmitted by insects </li></ul><ul><li>Malaria </li></ul><ul><li>(Transmitted by the </li></ul><ul><li>Anopheles mosquito) </li></ul><ul><li>Chagas disease (vinchuca) </li></ul><ul><li>Sleeping sickness </li></ul><ul><li>(Tsetse fly) </li></ul>
  8. 8. Algae can be… <ul><li>Unicellular </li></ul><ul><li>Pluricellular </li></ul><ul><li>Colonial </li></ul>
  9. 9. Algae are always photosynthetic
  10. 10. Algae can live in… <ul><li>Seawater (seaweed) </li></ul><ul><li>Freshwater </li></ul>
  11. 11. We can classify algae in… <ul><li>Green algae </li></ul><ul><li>Red algae </li></ul><ul><li>Brown algae </li></ul>
  12. 12. Algae can be confused with plants… <ul><li>Ulva lactuca </li></ul><ul><li>Lettuce </li></ul>
  13. 13. … but algae don’t have real tissues <ul><li>PLANTS </li></ul><ul><li>Leaves </li></ul><ul><li>Stipe </li></ul><ul><li>Roots </li></ul><ul><li>ALGAE </li></ul><ul><li>Philloids </li></ul><ul><li>Cauloid </li></ul><ul><li>Rhizoid </li></ul>
  14. 14. … if we watch carefully, all the cells of algae are the same…
  15. 15. Algae use to be beneficial to us <ul><li>Cosmetics </li></ul><ul><li>Food </li></ul><ul><li>Laboratory material </li></ul>

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