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Animal-like Protists and Funguslike Protists

Animal-like Protists and Funguslike Protists. Before we begin…some review. What does the term “eukaryotic” mean? What does the term “ heterotroph ” mean? What does the term “ autotroph ” mean? What is the difference between “unicellular” and “ multicellular ”?. What is a Protist ?.

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Animal-like Protists and Funguslike Protists

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  1. Animal-like Protists and Funguslike Protists

  2. Before we begin…some review • What does the term “eukaryotic” mean? • What does the term “heterotroph” mean? • What does the term “autotroph” mean? • What is the difference between “unicellular” and “multicellular”?

  3. What is a Protist? • Diverse kingdom – sometimes called “junk drawer kingdom” • Are all eukaryotes • All live in moist environments • Mix of unicellular and multicellular • Mix of autotrophs and heterotrophs • Most have contractile vaculoes – pump water out of the organism

  4. Example Protists The Amoeba The Paramecium Algae

  5. Grouping Protists • Protists are classified into three groups: • Animal-like protists • Funguslikeprotists • Plant-like protists

  6. Animal-like Protists • Also called protozoans • All heterotrophs • All unicellular • Divided into four groups • Protozoans with Pseudopods • Protozoans with Cilia • Protozoans with Flagella • Others

  7. Protozoans with Pseudopods • These protists are called sarcodines. • They all have pseudopds that allow them to move and trap food. • Pseudopod – “false foot”; temporary bulge of the cell membrane that fills with cytoplasm • Example – Our old friend, the amoeba

  8. The Amoeba

  9. Protozoans with Cilia • These protists are called ciliates. • They all have cilia that allow them to move, obtain food, and sense the environment. • Cilia – hairlike projections from a cell that move in a wavelike pattern. • Example – paramecium

  10. Paramecium

  11. Protozoans with Flagella • These protists are called zooflagellates. • They all have flagella that help them move. • Flagella – long, whiplike tail • Many live in symbiosis in other organisms. • Symbiosis – interaction between two species • Example - Giardia

  12. Giardia

  13. Other Protozoans • These are called sporozoans. • They are all parasites that feed on the cells and body fluids of their hosts. • Example – Plasmodium, causes malaria

  14. Funguslike Protists • Have cell walls • Use spores to reproduce • Are heterotrophs • Three types: • Water molds • Downy mildews • Slime molds

  15. Water Molds and Downy Mildews • Live in water and moist places • Grow as tiny threads that look fuzzy • Can also attack food crops • Water mold destroyed potato crops in 1845-1846 and caused the Irish Potato Famine that killed over a million people!

  16. Water Molds and Downy Mildew Water mold growing on a fish. It is a parasite that will eventually kill the fish. Downy mildew growing on lettuce.

  17. Slime Molds • Live in moist soil and on decaying plants and trees • Can form pseudopods and eat bacteria

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