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Protists

Protists. I. Classification of Protists. Mostly unicellular Some multicellular/colonies Eukaryotic Heterotrophic & Autotrophic. I. Classification of Protists. A. By movement B. No agreement on how organisms in the Kingdom Protista should be classified

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Protists

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  1. Protists

  2. I. Classification of Protists • Mostly unicellular • Some multicellular/colonies • Eukaryotic • Heterotrophic & Autotrophic

  3. I. Classification of Protists • A. By movement • B. No agreement on how organisms in the Kingdom Protista should be classified • C. No agreement on which organisms should be considered protists • D. Any organism that is not a plant, animal or fungus

  4. II. Animallike Protists Phylum Ciliophora - ciliates

  5. A. Ciliophora 1. Movement – cilia - hairlike projections 2.Protection – trichocysts – long threads for food-getting and anchoring

  6. a. Binary fission b. Conjugation Cell splits into two lengthwise Form of “sexual” reproduction; creates varieties; exchange DNA; new combos of genes 3. Reproduction

  7. Examples • Stentor

  8. Examples • Didinuim

  9. 4.Example: Paramecium

  10. 1.Movement 2.Reproduce Flagella-long whip-like projections Binary fission B. Phylum Zoomastiginia

  11. Examples • Giardia

  12. Example: Trypanosoma

  13. Examples • Trichomonas

  14. 1.Movement 2.Reproduce None; parasitic- live in a host Form spores C. Phylum Sporozoa

  15. Life Cycle Of Plasmodium Spread of malaria

  16. Plasmodium a. Anopheles mosquito bites infected human, swallowing blood b. Mosquito bites healthy human,injecting spores c. Spores infect liver cells and liver cells burst

  17. Plasmodium d. Infected red blood cells burst, producing chills and fever **Control malaria by destroying the breeding place of Anopheles

  18. 1.Movement Pseudopodia-temporary cytoplasmic projections D. Phylum Sarcodina

  19. Example: Amoeba

  20. 3. Foraminifers • Make shells of Calcium Carbonate, when they die, shells accumulate on ocean floor b.Found in sedimentary rock- presence in oil deposits

  21. Examples: Foraminifers

  22. Radiolarians

  23. E. Harmful Relationships 1. Malaria - Plasmodium 2. African Sleeping Sickness-Trypanosoma • Carried by the tse tse fly • Attacks nervous system; “sleep” to death

  24. E. Harmful (con’t) 3. Amebic dysentery- Entamoeba • Attach to intestines to absorb food and attack intestinal wall

  25. F. Helpful Relationships 1. Termites-Trichonympha • Digest cellulose in gut 2. Food- Supply food in food chain in fresh water systems

  26. III. Plantlike Protists Contain chlorophyll and carry out photosynthesis

  27. 1. Movement 2. Reproduce Uses Flagella Binary fission Recycle sewage and other waste material Phylum Euglenophyta (algae)

  28. 3. Example: Euglena

  29. Spirogyra

  30. 1. Movement 2. Reproduce 3. Dino-flagellates Two Flagella Binary Fission Luminescent; cause red tide B Phylum PyrrphytaFire Plants (algae)

  31. Red Tides

  32. 1.Cells are enclosed with delicate and ornate two part shells of silica Phylum ChrysophytaGolden Plants(algae)

  33. 2. Diatoms Most abundant species in the ocean

  34. Diatoms • Yellow-green algae • Golden Brown algae

  35. 1.Phylum Acra-siomycota 2.Phylum Myxomycota Cellular slime molds Acellular slime molds D. Slime Molds (Fungus)

  36. Slime Mold

  37. 1.Blooms Enormous masses of cells; deplete lake oxygen; waste builds up; uses up all oxygen E. Harmful Relationships

  38. 2.“Red Tide”- blooms of the dinoflagellate Gonyaulax and Polyhedron Kills shellfish or makes them unfit to eat; kills fish and organism further on the food chain E. Harmful Relationships

  39. 1.Coral-mutualism a. coral uses nutrients from photo-synthesis of dino-flagellate b.Dino-flagellates use waste products; F. Helpful Relationships

  40. 2. Giant clam-mutualism Same; clam benefits from photo-synthetic dino-flagellates

  41. 3. Phyto-plankton 70% of photo-synthesis; food for animals

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