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Virginia Institute of Marine Science, College of William & Mary Partnership between Educators and Researchers for En

Virginia Institute of Marine Science, College of William & Mary Partnership between Educators and Researchers for Enhancing Classroom Teaching (GK-12 PERFECT). Funding source: National Science Foundation GK-12 grant no. DGE-0840804. Slime Molds. Slime mold video 1. Slime mold video 2.

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Virginia Institute of Marine Science, College of William & Mary Partnership between Educators and Researchers for En

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  1. Virginia Institute of Marine Science, College of William & Mary Partnership between Educators and Researchers for Enhancing Classroom Teaching (GK-12 PERFECT) Funding source: National Science Foundation GK-12 grant no. DGE-0840804

  2. Slime Molds Slime mold video 1. Slime mold video 2.

  3. KINGDOM PROTISTA

  4. Characteristics of Protista • Nucleus with DNA and more than 1 chromosome • Most have other organelles (mitochondria, endoplasmic reticulum, Golgi bodies, etc.) • Reproduce by mitosis and/or meiosis

  5. Parabasalids & Diplomonads • Evolutionarily “primitive” eukaryotes • Poorly developed mitochondria and fewer organelles • Flagellated • Includes symbionts and parasites living in low O2 environments • Giardia

  6. Euglenoids & Kinetoplastids Thick, reinforced flagellum • Euglena • Fresh and marine • Mostly autotrophs with chloroplasts

  7. Kinetoplastids • Mostly parasites • African sleeping sickness

  8. Forams & Radiolarians • Both are mainly heterotrophs (most are marine) • Foraminiferans • Calcium carbonate shells • Benthic (bottom dwelling) & planktonic • Radiolarians • Silica shells • Planktonic

  9. Alveolates • Alveoli - small membrane bound sacs beneath the plasma membrane

  10. Alveolates (ciliates) • Aquatic • Large component of the microzooplankon (< 200 mm) • Loricate (shell) and aloricate forms

  11. Alveolates (flagellates) • Apicomplexans (malaria) • Dinoflagellates • Responsible for many harmful algal blooms • Marine and freshwater • Autotrophs, heterotrophs and mixotrophs • Cellulose plate covering • 2 flagella • Bioluminescent forms

  12. Stramenopiles • Unique “bristled” flagella • Most are autotrophs (photosynthetic) • Chrysophytes – mostly phytoplankton • Brown algae – kelp/seaweeds

  13. Chrysophytes Coccolithophorids • Calcium carbonate shells (coccoliths) • Mainly marine

  14. Chrysophytes Diatoms • Silica shells • Important marine and freshwater phytoplankton

  15. Brown algae

  16. Red and Green algae • Various “seaweeds” • Mainly multicellular • Marine and freshwater • Include closest relatives to land plants

  17. Amoebozoa • Closest relatives to animals and fungi • Includes single celled amoebas and slime molds

  18. Some more on HABs HAB video 1. HAB video 2.

  19. Interesting tidbits More on slime molds.

  20. Interesting tidbits • If the smallest protist were size of a BB, what object might approximate the size of the largest?

  21. Interesting tidbits • Answer: approximately 13 Goodyear Blimps stacked end to end - largest would be ½ mile diameter • Largest protist – 20 cm test (shell) • Smallest protist – some phytoplankton 1 mm diameter • http://www.sizes.com/natural/protists.htm

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