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Protista

Protista. In General. Animal-like. Mostly aquatic life Usually unicellular Always Eukaryotic Reproduction: Some asexual, some sexual, some both Feeding: Most heterotrophic, some autotrophic Kingdom for life that doesn’t fit in animals, plant or fungi 3 main categories. Plant-like.

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Protista

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  1. Protista

  2. In General Animal-like • Mostly aquatic life • Usually unicellular • Always Eukaryotic • Reproduction: • Some asexual, some sexual, some both • Feeding: • Most heterotrophic, some autotrophic • Kingdom for life that doesn’t fit in animals, plant or fungi • 3 main categories Plant-like Fungi-like Analogy: Kitchen junk drawer

  3. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas

  4. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas

  5. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas 2) Flagellates: move w/ flagella • Ex: Trypanosoma causes sleeping sickness Giardia causes diarrhea Vector: tsetse fly Trypanosoma

  6. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas 2) Flagellates: move w/ flagella • Ex: Trypanosoma causes sleeping sickness

  7. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas 2) Flagellates: move w/ flagella • Ex: Trypanosoma causes sleeping sickness 3) Ciliates: move w/ cilia • Ex: Paramecia

  8. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas 2) Flagellates: move w/ flagella • Ex: Trypanosoma causes sleeping sickness 3) Ciliates: move w/ cilia • Ex: Paramecia Rotifers beat their cilia to create a current to draw water into their “mouths”

  9. Animal-Like Protista • AKA: Protozoans • Heterotrophic: pathogens, parasites, predators • Classified by how they move: 1) Pseudopods : move w/ pseudopodia (false- feet) • Engulf by phagocytosis • Ex: Amoebas 2) Flagellates: move w/ flagella • Ex: Trypanosoma causes sleeping sickness 3) Ciliates: move w/ cilia • Ex: Paramecia Amoeba (pseudopod) eating Paramecia (ciliates) The paramecia start to freak out once they start to be digested!

  10. Animal-Like Protista & Disease Plasmodium injected by mosquito bite • Malaria • Cause: Plasmodium • Vector: mosquitoes • Effects in humans: Fever, vomiting, coma, death Plasmodium develop inside your liver Plasmodium reproduce inside your RBCs Plasmodium reenters mosquito when bitten

  11. Plant-like Protista • AKA: Algae • Plant-like: Photosynthetic • No roots, no leaves, usually unicellular • Classified by their type of cell wall 1) Euglenoids (Euglena): use flagella to swim • Plant-like: photosynthetic • Animal-like: swim

  12. Plant-like Protista • AKA: Algae • Plant-like: Photosynthetic • No roots, no leaves, usually unicellular • Classified by their type of cell wall 1) Euglenoids (Euglena): use flagella to swim • Plant-like: photosynthetic • Animal-like: swim

  13. Plant-like Protista • AKA: Algae • Plant-like: Photosynthetic • No roots, no leaves, usually unicellular • Classified by their type of cell wall • Euglenoids • Plant-like: photosynthetic • Animal-like: swim 2) Dinoflagellates • Most plankton • Basis of aquatic food chains 3) Diatoms • Glasslike shells • Provide ~ ½ Earth’s O2

  14. Plant-like Protista • AKA: Algae • Plant-like: Photosynthetic • No roots, no leaves, usually unicellular • Classified by their type of cell wall • Euglenoids • Plant-like: photosynthetic • Animal-like: swim 2) Dinoflagellates • Most plankton • Basis of aquatic food chains 3) Diatoms • Glasslike shells • Provide ~ ½ Earth’s O2

  15. Diatom Art!

  16. Fungus-like Protista • Decomposers: recycle nutrients • Mobile at stages of life cycle • Spores can develop cilia • Slime Molds: large (~1 meter) single celled mass of cytoplasm • Fungus & animal-like

  17. Fungus-like Protista • Decomposers: recycle nutrients • Mobile at stages of life cycle • Spores can develop cilia • Slime Molds: large (~1 meter) single celled mass of cytoplasm • Fungus & animal-like

  18. Fungus-like Protista • Decomposers: recycle nutrients • Mobile at stages of life cycle • Spores can develop cilia • Slime Molds: large (~1 meter) single celled mass of cytoplasm • Fungus & animal-like • Water molds: can be parasitic • Potato blight: disease

  19. Fungus-like Protista • Decomposers: recycle nutrients • Mobile at stages of life cycle • Spores can develop cilia • Slime Molds: large (~1 meter) single celled mass of cytoplasm • Fungus & animal-like • Water molds: can be parasitic • Potato blight: disease

  20. Protista: The Origins of Multicellular Life • Some protista are… • 1) Single-celled • Live by themselves • 2) Colonial • Group of independent acting cells • No specialized cells • 3) Multicellular • Cells specialized to be specific jobs • Importance: Ancestors of multicellular life This is a colony of cells called Volvox Unicellular Euglena Multicellular Kelp

  21. Kingdom Protista • Animal-like • Pseudopods • Move with false feet • Flagellates • Move with flagella • Ciliates • Move with cilia • Plant-like • Diatoms • Glass-like shells • Dinoflagellates • Plankton • Euglenoids • Move like animals, autotrophs like plants • Fungus-like • Slime molds • Move like animals, absorb food like fungi • Water molds • Often parasites • Responsible for Irish Potato Famine

  22. Kobe Kuiz • 1) Name the three categories of protista. • 2) Which category of protista has members that are able to move? • 3) Which category of protista has members that absorb nutrients? • 4) Which category of protista has members that are heterotrophs? • 5) Which category of protista has members that hunt? • 6) How does a pseudopod, flagella, and cilia differ? • 7) Name the 3 major categories of protozoa. • 8) Name the 3 major categories of algae. • 9) Name the 2 major categories of fungus-like protista.

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