Protista

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Protista
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• Most are unicellular, but some are multicellular

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• Are eukaryotes

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• This means they have a nucleus

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• Do not have a cell wall

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• Can be autotrophs or heterotrophs

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• Have sexual or asexual reproduction

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• Move by one of three methods

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• Flagella- a whip-like tail. Can have anywhere
  from 1-8 flagella

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• A Euglena moves using a flagella

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Euglena
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• Giardia move using many flagella. They cause
  disease and are found in mountain streams.

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• Giardia

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• Cilia- short hair-like structures that move in
  unison to propel the organism through the water

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• Paramecium

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• Pseudopod-foot-like projection that is pushed and
  pulled by the organism in the direction it needs
  to go

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• Feed using a method called phagocytosis, or
  engulfing

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• Ameba

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• Live in fresh water, sea water and moist soil

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• Most Protists are unicellular

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• Algae can be unicellular or multicellular

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• Pond weed and duck weed are examples of
  unicellular algae

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• Giant kelp is an example of a multicellular algae

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• Red algae cause Red Tides which kill many
  organisms that feed on it

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• Algae produce huge amounts of oxygen for the
  atmosphere

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• Diatoms are a special Protist that produce a
  glass shell made of silicon dioxide

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• Diatoms are used in toothpaste, car polish,
  insecticides and pool filters

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• Huge deposits of diatomaceous earth are found in
  Nevada and are mined

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• Diatoms

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• Another diatom