Protists

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Notes from 5-6

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Protists

  1. 1. PROTISTSChapter 2 Lesson 3
  2. 2. PROTISTSA. Eukaryotes that cannot be classified as animals,plants or fungiB. A diverse group Most are unicellular Some are large, simple multicellular Some are heterotrophs Some are autotrophs Some are both heterotrophic & autotrophic Some can move Some cannot move All live in moist environments
  3. 3. ANIMAL-LIKE PROTISTSA. Like animals: Heterotrophic Most can moveB. Unlike animals: UnicellularC. Sarcodines Move with pseudopods ‘false foot’ Slow moving via the cytoplasm flowing in a direction using thepseudopod and then the rest of the body follows Ex. Amoeba http://www.youtube.com/watch?v=iRQTY_9Yekc
  4. 4. D. Flagelattes Protozoans that use one or more long whiplike flagella to move Ex. Giardia http://www.youtube.com/watch?v=-yIHkq9R5_cE. Ciliates Use hundreds of hairlike projections, cilia, to move and feed Ex. Paramecium http://www.youtube.com/watch?v=fh_yjLppNAgF. Spore-forming parasitic protists Feed on the body fluids of their hosts Most depend on a host for transportation (ex. Mosquito) Ex. Plasmodium causes malaria
  5. 5. PLANT-LIKE PROTISTS (ALGAE)A. Like Plants: Autotrophs that use photosynthesis & produce much of the world’soxygen Can be multicellularB. Unlike Plants: Can be unicellular Lack true leaves, stems and roots Some can move and some are heterotrophic in addition toautotrophicC. Euglenoids Unicellular algae that can act as heterotrophs in the absence ofsunlight Eyespot used to detect light Flagella that allows movement http://www.youtube.com/watch?v=fI7nEWUjk3A
  6. 6. D. Dinoflagellates Unicellular Flagella Multicolor and some glow in the dark http://www.youtube.com/watch?v=EN1Yxq8KMswE. Diatoms Unicellular Glass-like cell walls Move by oozing along a slime released from the cell wall Form diatomaceous earth used in household products like SoftScrub and some toothpastes
  7. 7. F. Red Algae Multicellular seaweed Can grow deep underwater because of it’s ability to absorb even a smallamount of light (~260m) Nutrient rich food and is used in ice cream (makes it smoother) and hairconditionerG. Brown Algae Most seaweed The most plant-like in structure of the plant-like protists Edible and sometimes used as thickeners in puddings andother foods
  8. 8. FUNGUS-LIKE PROTISTSA. Like Fungus: Heterotrophs Cell walls Reproduce with sporesB. Unlike Fungus: Are able to move at some point in their lifeC. Slime Molds Brilliantly colored Unicellular or multicellularD. Water Molds & Downy Mildews Live in wet places Attack crops (ex. Irish potato famine 1845 & 1846)

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