Kingdom Protista


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Kingdom Protista

  1. 1. Notes<br />October 27-29, 2009<br />Kingdom Protista<br />
  2. 2. What is a Protist?<br />Eukaryotes- have a nucleus<br />Cannot be classified as an animal, plant or fungi<br />The “odds and ends” kingdom/Diversity<br />Both unicellular and multi-cellular<br />Both Heterotroph and Autotroph<br />Both a stationary and move<br />All live in moist environments<br />
  3. 3. 3 Categories of Protists…<br />Animal-like Protists called Protozoans<br />Heterotrophs<br />Able to move from place to place to obtain food<br />Unicellular<br />
  4. 4. 4 classifications of Protozoa<br />Based of how each moves<br />Pseudopods- False Foot<br />Moves when cytoplasm moves toward one location and the rest of the organism follows<br />Phylum: Rhizopods<br />Example: Amoeba<br />Uses Pseudopods to trap food<br />Live in fresh water<br />Have contractile vacuoles—collects the water and expels it from the cell<br />
  5. 5. Cilia--hair-like structures<br />Moves in wavelike motion<br />Phylum: Ciliates<br />Example: Paramecium<br />2 Contractile Vacuoles<br />More than one nucleus<br />Large-controls the everyday tasks<br />Small-functions in reproduction<br />Reproduce both sexually and asexually<br />
  6. 6. Flagella-long, whip-like threads<br />Phylum: Flagellates<br />Some live inside other organisms<br />Parasites-characterized by how they live, not how they move<br />They feed on the cells and body fluids of its host<br />
  7. 7. Plant-like Protists called Algae<br />Autotrophs<br />Important food source for organisms in H2O<br />Much of O2 comes from algae<br />Vary greatly in size<br />Both unicellular, multi-cellular, and unicellular that live in colonies<br />Wide variety of colors<br />Pigment- chemicals that produce color<br />
  8. 8. 6 Types of Algae<br />Diatoms<br />Unicellular protists with glasslike cell walls<br />Float on H2O or attach to rocks<br />Food source for heterotrophs<br />Move by oozing chemicals out of slits in their cell wall<br />Used in household scouring products (after they die)<br />
  9. 9. Dinoflagellates<br />Unicellular algae surrounded by stiff plates that look like a suit of armor<br />Variety of colors<br />2 flagella<br />move together to make the cell spin like a top<br />Many glow in the dark<br />
  10. 10. Euglenoids<br />Green, unicellular algae<br />Found in fresh water<br />One animal-like characteristic<br />Can be heterotrophs when sunlight is NOT available<br />Most are Autotrophs<br />Example: Euglena<br />Uses a flagellum to move<br />Has an eyespot- part that is sensitive to light, directs it toward the light<br />
  11. 11. Red Algae<br />Most are multi-cellular seaweeds<br />Good at absorbing small amount of light deep in H2O<br />Ways we use Red Algae<br />Ice cream<br />Hair conditioner<br />Food in Asian cultures<br />
  12. 12. Green Algae<br />Most are unicellular<br />Live in fresh or salt water<br />Few live on land (rocks tree bark, moist soil)<br />Closely related to land plants<br />Some scientists think that Green algae should belong in the plant kingdom<br />
  13. 13. Brown Algae<br />Commonly known as seaweed<br />Many plant like structures<br />Roots, stalks, blades (leafs)<br />Gas-filled sacs called bladders- allows it to float upright<br />Flourish in cool, rocky waters<br />Example: Giant kelp (grow to be 100 m long)<br />Used:<br />To eat <br />As a thickener in pudding<br />
  14. 14. Fungus-like Protists<br />“Sort of Like” organisms<br />Like animals-heterotrophs<br />Like plants-have a cell wall<br />Use spores to reproduce<br />Spore: tiny cell that is able to grow into a new organism<br />Move at some point in its life<br />
  15. 15. 3 Types of Fungus-like Protists<br />Slime Molds<br />Bright colored<br />Live on forest floors and moist shady places<br />Ooze along decaying material feeding on bacteria and other microorganisms<br />Form giant jelly-like masses<br />
  16. 16. Water Molds and Downy Mildew<br />Live in H2O and moist places<br />Look like fuzz<br />Attack and destroy crops<br />