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Protists

Protists. Diversity of Protists Protozoans Slime Molds Algae Ecological Role & Disease. Diversity of Protists. A. Characteristics B. Structure and Function C . Modes of Nutrition. “ Click”. A. Characteristics. 1. Eukaryotic (have a nucleus)

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Protists

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  1. Protists Diversity of Protists Protozoans Slime Molds Algae Ecological Role & Disease

  2. Diversity of Protists A. Characteristics B. Structure and Function C. Modes of Nutrition “Click”

  3. A. Characteristics 1. Eukaryotic (have a nucleus) 2. Unicellular, multicellular, or colonial (groups) 3. Most move_

  4. B. Structure and Function 1. Extremely diverse a. very complex cell structure b. perform all the functions of other eukaryotes 2. Grouped by type of nutrition_ “Click”

  5. C. Modes of Nutrition 1. Protozoans (animal-like) a. are consumers b. classified by how they move_ “Click”

  6. 2. Slime molds (fungus-like) a. consumers- decomposers b. live in cool damp places c. feed on bacteria & decaying plant matter d. have a unique life cycle_ “Click”

  7. 3. Algae (plant-like) a. are producers b. can be unicellular or multicellular c. make up plankton communities d. can be classified by color_ “Click”

  8. THE END

  9. Protozoans A. Zooflagellates B. Sarcodinians C. Ciliaphorans D. Apicomplexans “Click”

  10. A. Zooflagellates 1. Zooflagellates move by one or more flagella 2. Giardia a. contains 2 nuclei and lack mitochondria b. believed to be closely related to prokaryotes_ “Click”

  11. 3. Trypanosoma a. causes sleeping sickness_

  12. B. Sarcodinians 1. Sarcodinians move by extensions of the cytoplasm called pseudopodia_ “Click”

  13. 2. Amoeba a. causes amoebic dysentery_ “Click”

  14. 3. Forams a. have porous shells made of calcium carbonate b. shell buildup forms limestone_ “Click”

  15. 4. Radiolarians_ “Click”

  16. C. Ciliates 1. Move by hair-like extensions called cilia 2. Paramecium a. sweep food into body by cilia_ “Click”

  17. Conjugation in Paramecium

  18. Conjugation Paramecia Binary fission

  19. 3. Stentor_

  20. 4. Stylonychia_

  21. D. Apicomplexans (Sporozoa) 1. Have no way of movement a. act as parasites_ sporozoites merozoites

  22. 2. Plasmodium a. causes malaria_

  23. THE END

  24. Slime Molds A. Plasmodial Slime Molds B. Cellular Slime Molds C. Water Molds & Mildews

  25. A. Plasmodial Slime Molds • Plasmodial slime molds feed as a single mass of cytoplasm-plasmodium • 2. When food and water supplies are low it reproduces by a fruiting body-sporangia • 3. Meiosis produces haploid spores_ “Click”

  26. B. Cellular Slime Molds 1. Cellular slime molds feed as individual amoeba-like cells 2. When food and water supplies are low it reproduces a. forms a slug-like colony b. then fruiting body 3. Dictyostelium 3 stages: individual, colony, spore_ “Click”

  27. C. Water Molds & Mildews 1. Water molds decompose dead organisms in water a. some are parasites b. unicellular or thin branching filamentsc. sexual reproduction 2. Downy mildews are spread by the wind a. Phytophthera infestans –responsible for the Irish potato famine -clones Water molds & downy mildew more closely related to algae_ “Click”

  28. THE END

  29. Algae A. Dinoflagellates B. Diatoms C. Euglenoids D. Seaweeds

  30. A. Dinoflagellates 1. Dinoflagellates a. have two flagella b. cell wall made of cellulose c. causes red tide 2. Some can produce light_ “Click”

  31. B. Diatoms 1. Diatoms contain cell walls made of glass a. gritty, used in toothpaste and cleansers_ “Click”

  32. C. Euglenoids 1. Euglenoids a. photosynthesize and absorb food b. lack cell wall c. eyespot helps them find light_ “Click”

  33. D. Seaweeds 1. Seaweeds are large multicellular marine algae 2. Green algae a. are believed to be the closest relatives to plants b. volvox live in colonies c. spirogyra has spiral chloroplasts_ “Click”

  34. 3. Red algae a. contain pigments that allow them to capture light in deep water_

  35. 4. Brown algae a. giant kelp can reach up to 50 meters in length_ “Click”

  36. THE END

  37. Ecological Roles & Disease A. Ecological Role B. Disease “Click”

  38. A. Ecological Role 1. Provide habitat for marine life 2. Act as a major food source in the water_

  39. 3. Form symbiotic relationships that can help others_ “Click”

  40. B. Disease 1. Giardia- diarrhea 2. Trypanosoma- blood diseases 3. Dinoflagellates- red tide_ “Click”

  41. 4. Amoeba- amoebic dysentery 5. Plasmodium- malaria_

  42. THE END

  43. Diversity of Protists A. Origin of Eukaryotes B. Characteristics C. Structure and Function D. Modes of Nutrition

  44. C. Structure and Function 1. Extremely diverse a. very complex cell structure b. perform all the functions of other eukaryotes

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