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Protists

Protists. Animal-like Protists. Protozoans Heterotrophic (Obtain food from other organisms) Four. Protozoa with Pseudopods. A pseudopod is a temporary bulge of the cell membrane filled with cytoplasm It is used for feeding and movement Another Name: Sarcodines

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Protists

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  1. Protists

  2. Animal-like Protists • Protozoans • Heterotrophic (Obtain food from other organisms) • Four

  3. Protozoa with Pseudopods • A pseudopod is a temporary bulge of the cell membrane filled with cytoplasm • It is used for feeding and movement • Another Name: Sarcodines • A member of this group: Ameoba

  4. Protozoa with Cilia • Hair-like projections that move in a wavelike pattern. It is used for movement, feeding, and to sense the environment. • The large nucleus controls the everyday tasks and the small nucleus functions in reproduction. • Ciliates is another name • Paramecium are a common member.

  5. Protozoa with Flagella • A flagellum is a long, whip-like structure that is used for movement • Zooflagellates have one to eight long, whip-like flagella to help them move. They live inside the bodies of other organisms. • Symbiosis: A close relationship between two species where at least one species benefits.

  6. Diverse Protozoa • Move • The way they LIVE and MOVE • Sporozoan: Parasites that feed on the cells and body fluids of their hosts.

  7. Fungus-Like Protists • Get their food from their environment • Heterotrophs • Fungus; move

  8. Fungus-Like Protists • Water Molds • Water or moist places • They grow as tiny threads that look like a fuzzy covering on a living organism

  9. Fungus-Like Protists • Slime Molds • In moist soil and on decaying plants and trees • When food is scarce, they will creep together and form a multicellular mass • They move in an amoeba-like way by forming pseudopods and oozing along the surfaces of decaying material. • Spore: Tiny cell that can grow into a new organism

  10. Plant-Like Protists • Algae • Chloroplasts; sun • Autotrophs (make their own food)

  11. Plant-Like Protists Euglenoids • No Cell Wall • Unicellular • Use a flagella for movement • They are unique because when sunlight isn’t available, they become heterotrophic and EAT.

  12. Plant-like protists • Dinoflagellates • Bodies are covered by stiff plates • They live in the water • Have two flagella and contain chlorophyll as well as other pigments • Random fact: They can glow in the dark!

  13. Plant-Like Protists • Diatoms are unicellular with glass-like cell walls. • They move by shooting chemicals out of their cell walls. This gives them a kind of jet propulsion.

  14. Plant-Like Protists • Green algae • Where do they live? Freshwater, saltwater, at the bases of trees/in moist soil • Most are unicellular, some form colonies, and a few are multicellular

  15. Plant-Like Protists • Red algae • They are multicellular SEAWEEDS • Their red color is beneficial because: • They can live deep below the ocean’s surface • The red pigment is good at absorbing a small amount of light.

  16. Plant-Like Protists • Brown algae • A pigment is a chemical that produces color • In the Pacific coastal waters, brown algae makes the GIANT KELP.

  17. Autotroph (write this in the plant-like protist section) • An organism that has the ability to make its own food.

  18. Protist Review Questions • Define heterotroph and autotroph. Give an example of each. • Describe how protists are different from animals, plants, and fungus. • Explain the difference between unicellular and multicellular. • What are the three concepts of the cell theory. Spore: tiny cell that can grow into a new organism

  19. Define heterotroph and autotroph. Give an example of each. • A heterotroph cannot make its own food, so it has to get it from another organism. • An autotroph can make its own food. • Examples: • Heterotroph: Animals or Fungus • Autotroph: Plants

  20. Describe how protists are different from animals, plants, and fungus. • Protists are much simpler than plants, animals, and fungus. • They are typically unicellular, while plants, animals, and fungus are multicellular.

  21. Explain the difference between unicellular and multicellular. • Unicellular: A single celled organism • Multicellular: Many cells make up one organism

  22. What are the three concepts of the cell theory. • Every living thing is made up of one or more cells. • Cells carry out the functions needed to support life • Cells come only from other living cells

  23. What characteristics do all protozoans share? • Heterotrophic • Able to move from place to place

  24. 3 characteristics of fungus-like protists • Heterotrophic • Cell Walls • Reproduce with spores

  25. What characteristic do algae share with plants • Autotrophic

  26. Would you classify euglena as an animal-like protist or as a plant-like protist? Explain. • Answers will vary.

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