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Protists

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Transcript

  • 1. The World of Protists Plantlike vs. Animal-Like
  • 2. Part 1 Protists…. What are they? How do they move, eat, and reproduce?
  • 3. Protists
    • Protists are mostly single celled microscopic organisms.
    • They can have traits of animals, plants, or both.
    • They usually live in ponds, rivers, oceans, and damp soil.
  • 4. Movement and Food
    • An amoeba forms a pseudopod , or false foot, to move and capture food.
    • Parameciums have hairlike structures called cilia which propel the organism and draw in food.
    • Other protozoans have a flagella or whiplike tail for movement.
    • Use chlorophyll to make their own food.
    • Some have a flagella for movement. (Can feed on other organisms if there is not enough sunlight).
    • It also has a “light sensitive eyespot” that is similar to an eye
    Animal-like protists Plantlike protists
  • 5. Reproduction
    • Most protists reproduce by a process called fission , or the dividing of a cell to make two new cells.
    • In this form there is only one “parent” and the new cells are identical to the parent.
  • 6. Part 2 Comparing animal-like protists and plantlike protists
  • 7. Let’s Compare Protozoan Fungi Most are single celled They live in all parts of the environment Some are animal-like and some are plantlike Actively search for food They can be parasites Most are multicellular Most live and grow on organic material They are plantlike but have no chloroplasts Produce their own food
  • 8. Parasites- Animal-like protists
    • Some protozoans do not move on their own. Most of these are called parasites.
    • A parasite is an organism that lives on another organism.
  • 9. Algae - Plantlike Protists
    • Diatoms- single-celled algae found in fresh water and sea water.
    • Plankton- tiny organisms that float near the ocean’s surface.
  • 10. Interesting Fact Multicellular Protists include seaweed and fresh water algae
  • 11. Part 3 Protozoan Diseases and Different types of Fungi
  • 12. Malaria
    • Malaria is caused by a protozoan parasite called Plasmodium which is mostly carried by mosquitoes (Anopheles). It is a disease that attacks the red blood cells in the host.
    • Prevention
        • Avoid being bitten
        • Drain swampy areas
        • Use insecticides
        • Use protective netting
        • Treatment- Includes a variety of medicines!
  • 13. Cool Fact
    • Did you know that bread yeast is a single celled fungi that can produce a kind of alcohol called ethanol.
      • So what?...
    • Ethanol is used in the food and drink industry, cleaning industry, and is even being used in the automotive industry as an alternate fuel source.
  • 14. Fungi
    • Fungi are organisms that live on the remains of dead organisms, many are called saprophytes .
    • Spores are the reproductive cells carried by fungi that develop into new organisms.
    • Without fungi the world would be buried under mountains of dead materials.
  • 15. Good and Bad Fungi
    • Some fungi, like certain molds, produce important substances like medicine (ex. Penicillin)
    • Other fungi, like yeasts, are used to make foods such as bread.
    • Some fungi can be parasitic causing great damage to crops.
    • Examples are rusts, smuts, and powdery mildews