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Protista , Fungi, Bacteria, and Viruses

Protista , Fungi, Bacteria, and Viruses. Protista. A protist is any organism that is not a plant, animal or fungus - Eukaryotes ( have nucelus ) - U nicellular or multicellular - Heterotrophs (obtain food) or autotrophs (make food)

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Protista , Fungi, Bacteria, and Viruses

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  1. Protista, Fungi, Bacteria, and Viruses

  2. Protista • A protist is any organism that is not a plant, animal or fungus -Eukaryotes (havenucelus) -Unicellular or multicellular -Heterotrophs (obtain food) or autotrophs (make food) -May be categorized into animal-like (movement), plant-like (algae), or fungus-like (water molds)

  3. Protista • Some live freely; others on parasites • Most live in water • EX/ amoeba, paramecium, algae, mold • **Algae benneficial- produces oxygen and food for lower organisms on food chain, fertilizers..ect • http://www.youtube.com/watch?v=-zsdYOgTbOk

  4. Kingdom Fungi • Eukaryotes (Havenucelus) • Unicellular or multicellular, • Heterotrophs, autotrophs, saprophytic (break down dead matter) • Some are parasitic and obtain nutrients from living hosts **Benneficial- mushrooms as food, penicillin production, eat decaying matter, yeast (beer/bread)

  5. Fungi Structure: Have cell walls that contain chitin Do not undergo photosynthesis Hyphae:Long branching structure of fungi Mycelium: Vegetative part of fungi and reproductive part Mycologist (scientist who study fungi) are said to have only identified 5% of all fungi

  6. Largest living thing in the world? • 2400 yrs old and 2200 acres (1665 football fields) in Oregon

  7. Bacteria “germs” • Classified into 3 groups based on their shapes- • Cocci: Round shaped • Bacilli: Rod shaped • Spirilli: Spiral shaped Bacteria Structure

  8. Bacteria • Respiration: • Obligate anaerobes - cannot survive in the presence of atmospheric oxygen. • Facultative anaerobes - can live with or without atmospheric oxygen. • Obligate aerobes - cannot survive without atmospheric oxygen. *Beneficial uses? -digestion, building up/breaking down organic compounds, wastes, tobacco, immune system

  9. HOW TO PREVENT THE SPREAD OF BACTERIA • Wash hands • Disinfect surfaces • Sanitize • Store foods at Proper temps

  10. Viruses • Surrounded by a protein coat called CAPSID • NOT considered living • 1/100th size of bacteria • Has only RNA or DNA (not both)

  11. Viruses • Reproduces only after infecting a host cell (Can not live independently)Reproduces quickly! • Lytic Cycle- Destroys cell by replicating virus Nucleic acids instead of the cells. Then it infects other cells • Lysogenic Cycle-DNA integrated into cells reproduction- does not destroy cell.

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