Kingdom Protista -Kingdom at the crossroads-
Classification <ul><li>Free-living  </li></ul><ul><li>Eukaryotic </li></ul><ul><li>unicellular, colonial forms </li></ul><...
Animal-like protists “Protozoans” <ul><li>Unicellular & colonial </li></ul><ul><li>Eukaryotic </li></ul><ul><li>heterotrop...
Animal-like protists <ul><ul><li>Ciliates - motile, cilia, free living </li></ul></ul><ul><ul><ul><li>Ex. Paramecium (repr...
Ameoba
Paramecium
Radiolarian
Plant-like protists <ul><li>Single celled </li></ul><ul><li>Photosynthetic </li></ul><ul><li>Some are flagellated, lumines...
<ul><li>Euglenophyta  - Euglena (autotrophic and heterotrophic) </li></ul><ul><li>Pyrrophyta  – dinoflagellates (luminesce...
Diatoms
Spyrogyra
Fungus-like protists <ul><li>Contain parasitic and predatory molds that produce spores </li></ul><ul><li>Most are single-c...
<ul><li>Acellular slime molds – help scientists study movement of protoplasm, form plasmodia at one point in life cycle </...
Slime mold
ALGAE Protists or Plants??? <ul><li>Red, Brown and Green Algae </li></ul><ul><li>Many scientists place them in Plant Kingd...
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Protist notes

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Protist notes

  1. 1. Kingdom Protista -Kingdom at the crossroads-
  2. 2. Classification <ul><li>Free-living </li></ul><ul><li>Eukaryotic </li></ul><ul><li>unicellular, colonial forms </li></ul><ul><li>3 types </li></ul><ul><ul><li>Animal like </li></ul></ul><ul><ul><li>Plant like </li></ul></ul><ul><ul><li>Fungus like </li></ul></ul><ul><ul><li>Most easily classified by what they are NOT </li></ul></ul><ul><ul><li>Not animals, not plants, not fungi </li></ul></ul>
  3. 3. Animal-like protists “Protozoans” <ul><li>Unicellular & colonial </li></ul><ul><li>Eukaryotic </li></ul><ul><li>heterotrophic </li></ul><ul><li>Endosymbiont Hypothesis </li></ul><ul><ul><li>First eukaryotic cell was formed by a symbiosis among several prokaryotes which lost the ability to live alone </li></ul></ul>
  4. 4. Animal-like protists <ul><ul><li>Ciliates - motile, cilia, free living </li></ul></ul><ul><ul><ul><li>Ex. Paramecium (reproduction by binary fission, conjugation) </li></ul></ul></ul><ul><ul><li>b. Flagellates – motile, flagella, reproduce asexually by binary fission and sexually </li></ul></ul><ul><ul><li>Ex. Trypanosoma – causes African sleeping sickness </li></ul></ul><ul><ul><li>Ex. Trichonympha – live in termites, help digest food </li></ul></ul><ul><ul><li>c. Sporozoans – non motile, parasitic, reproduce by spores </li></ul></ul><ul><ul><li>Ex. Plasmodium – causes malaria </li></ul></ul><ul><ul><li>d. Sarcodina – “false feet” pseudopods </li></ul></ul><ul><ul><li>Ex. Ameba – some cause amebic dysentary </li></ul></ul><ul><li>**Disease – infection caused by many of these** </li></ul>
  5. 5. Ameoba
  6. 6. Paramecium
  7. 7. Radiolarian
  8. 8. Plant-like protists <ul><li>Single celled </li></ul><ul><li>Photosynthetic </li></ul><ul><li>Some are flagellated, luminescent </li></ul><ul><li>May live freely or as colonies </li></ul><ul><li>Phytoplankton – primary producers of oxygen </li></ul>
  9. 9. <ul><li>Euglenophyta - Euglena (autotrophic and heterotrophic) </li></ul><ul><li>Pyrrophyta – dinoflagellates (luminescent, produce toxins that shellfish absorb – dangerous = RED TIDE) </li></ul><ul><li>Chrysophyta – diatoms, important component of marine plankton – food source for marine animals, silicon cell walls important component of detergents, polishes, paint removers </li></ul>
  10. 10. Diatoms
  11. 11. Spyrogyra
  12. 12. Fungus-like protists <ul><li>Contain parasitic and predatory molds that produce spores </li></ul><ul><li>Most are single-celled, decomposers in aquatic habitats </li></ul><ul><li>Phagocytic slime molds live as single amoeboid cells or aggregations of cells that migrate together and form spore producing structures </li></ul>
  13. 13. <ul><li>Acellular slime molds – help scientists study movement of protoplasm, form plasmodia at one point in life cycle </li></ul><ul><li>Cellular slime molds – help scientists study how cells communicate, function like a single, multicelled organism as one point in their life cycle </li></ul>
  14. 14. Slime mold
  15. 15. ALGAE Protists or Plants??? <ul><li>Red, Brown and Green Algae </li></ul><ul><li>Many scientists place them in Plant Kingdom </li></ul>

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