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protists (Plant-like Protists (fun facts (plantlike protists are commonly…

- - - - if there is sunlight available then they are autotrophs.
      - when there is no or little sunlight available they can be heterotrophs.
- - - - examples
        
        amoebas use pseudopods to move away from bright light.
        
        for protozoans that live in water such as amoebas the particles in the water pass easily through the cell membrane into the cyroplasm. if excess water were to build up in the cell the amoeba would burst.
        
        contractile vacuole
        
        a structure that collectsthe extra water and then expels it from the cell
        
        sarcodines use pseudopods to trap food.
  - - - the second group of protozoans are ciliates that have structure called ciliates
      - cilia are hair like projections from cells that move with a wavelike motion.
      - ciliates use their cilia to move to obtain food.
  - - - the third group of protozoans are known as falgellates, these protists use a whiplike flagella to move.
      - a flagellate can have more than one flagella.
    - - some flagella can live in the bodys of other organisms
        
        one type of flagellate live in the intestines of termites.
      - sometimes a protozoan harms its host.
        
        Giardia is a parasite in humans. wild animals such as beavers deposite Giardia into streams and rivers contaminating it .
        
        these protozoans attack the intestine.
  - - - where they live
        
        many parasites have more than one host.
        
        Plasmodium is a protozoan that causes malaria a disease of the blood
        
        two hosts are involved in the plasmodians life
        
        humans and mosquitos
      - the fourth group of protozoans are protists the feed off the cells and bodily fluids of another organism, they are known as parasites.
      - parasites are characterized more by the way they live than the way they move.
      - they can move in a variety of ways some with a flagella, some with a cilia.
- - - - because protists are so different scientists have come up with several ways of grouping these organisms.
        
        animal like protists, plant like protists, and fungi like protists.