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Protists

Protists. What is a Protist?. Very diverse kingdom Most are unicellular Cells have membrane bound nucleus, some contain chloroplast. Protists. Most reproduce asexually by binary fission Some reproduce sexually They like wet or moist surroundings. Classification of Protists.

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Protists

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  1. Protists

  2. What is a Protist? • Very diverse kingdom • Most are unicellular • Cells have membrane bound nucleus, some contain chloroplast

  3. Protists • Most reproduce asexually by binary fission • Some reproduce sexually • They like wet or moist surroundings.

  4. Classification of Protists • There are three kinds of protists: • PLANT-LIKE PROTISTS • ANIMAL-LIKE PROTISTS • FUNGI-LIKE PROTISTS

  5. Plantlike Protists • Contain chlorophyll for generating food in a process called photosynthesis • In periods of darkness cells can engulf food for nutrients • Example: Euglena

  6. Algae • Most are multi-cellular but do not form tissues • Contain chlorophyll that allow for photosynthesis • Includes sexual and asexual reproduction

  7. Animal Like Protists • Called “animal like” because they eat • Some engulf food, and some absorb nutrients directly through their cell membrane • Example: Amoeba, Paramecium and Sporazoan

  8. Amoeba • Amoeba’s feed by flowing around and engulf food particles • Amoeba reproduce by binary fission

  9. Paramecium • Uses hair-like structures called “cilia” to move around • Cilia can also be used to sweep food into the oral groove (mouth) • Usually reproduce by binary fission

  10. Sporazoan • No means of locomotion • Depends on host body fluids for movement • Ability to multiply asexually by forming spores

  11. Fungi Like Protists • Called “fungi like” because they are decomposers • 3 kinds: • Acellular Slime • Cellular Slime Moulds • Water Moulds

  12. Importance of Protists • Provides us with oxygen • Provides aquatic consumers with food • You have a protozoan living in your digestive tract right now, eating nutrients you do not need • Example:Trichomonas Hominis

  13. Pathogenic Protists • Example: Plasmodium • Causes Malaria • Carried by mosquitoes • Serious health problem throughout tropical areas of the world

  14. Pathogenic Protists • Example: Entamoeba Histolytica • Lives in human large intestine • Causes serious problems in the digestive tract • Sanitary disposal of human wastes is the best method of prevention

  15. Pathogenic Protists • Example: Trypanosoma • Transmitted by the Tsetse fly • Causes African Sleeping Sickness • Fever, chills, headache, skin irritation and disruption the sleep cycle

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