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Protista , Fungi, Bacteria, and Viruses

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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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Presentation Transcript
protista
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)

protista1
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
kingdom fungi
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)

fungi
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

slide6

Largest living thing in the world?

  • 2400 yrs old and 2200 acres (1665 football fields) in Oregon
bacteria germs
Bacteria “germs”
  • Classified into 3 groups based on their shapes-
  • Cocci: Round shaped
  • Bacilli: Rod shaped
  • Spirilli: Spiral shaped

Bacteria Structure

bacteria
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

how to prevent the spread of bacteria
HOW TO PREVENT THE SPREAD OF BACTERIA
  • Wash hands
  • Disinfect surfaces
  • Sanitize
  • Store foods at

Proper temps

viruses
Viruses
  • Surrounded by a protein coat called CAPSID
  • NOT considered living
  • 1/100th size of bacteria
  • Has only RNA or DNA

(not both)

viruses1
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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