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DMA: (1:00 to complete)

DMA: (1:00 to complete). How are bacteria and protists different?. Protistans/Protozoans. Starr/Taggart’s Biology: The Unity and Diversity of Life , 9e Chapter 23. Key Concepts:. The Kingdom Protista includes mostly single-celled eukaryotic cells

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DMA: (1:00 to complete)

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  1. DMA: (1:00 to complete) • How are bacteria and protists different?

  2. Protistans/Protozoans Starr/Taggart’s Biology: The Unity and Diversity of Life, 9e Chapter 23

  3. Key Concepts: • The Kingdom Protista includes mostly single-celled eukaryotic cells • Animal-like protistans include non-photosynthetic flagellated protozoans, sporozoans, and ciliates. • Many plant-like protistans are photosynthetic flagellates and are called phytoplankton. • Some plant-like protistans are multi-celled forms that include the red, brown, and green algae. • There are also fungus-like protistans that include the predatory slime mold.

  4. The Animal - Like Protists: • Groups: • Sarcodina • Amoebas and others with pseudopods • Mastigophora • Flagellates use flagella to move • Apicomplexa • Sporozoans that reproduce with spores • Ciliophora • Ciliates use cilia to move

  5. A Sampling of Ciliated Protozoans • Paramecium • Free-living and motile • Cilia • Contractile vacuole

  6. Ameoboid Protozoans • Sarcodina • Amoebas • Foraminiferans • Heliozoans • Radiolarians • Movement • Pseudopods http://www.activescience-gsk.com/miniweb/images/content/mini-web/cloning/amoeba.jpg

  7. Animal-like Flagellates • Mastigophora • Flagellated protozoans • Giardia lamblia • Trichomonas vaginalis • Trypanosomes • African Sleeping Sickness • Chagas disease • Parasites or free living predators http://www.mwra.state.ma.us/germs/giardia.gif

  8. Representative Sporozoans • Sporozoan • Life cycle complex, uses spores to reproduce • Involve 2 hosts or more • Plasmodium • Malaria • Cryptosporidium • Diarrhea • Toxoplasma • Birth defects http://www.medinfo.ufl.edu/year2/mmid/bms5300/images/d7219.jpg

  9. The Plant-Like Protists: • Protozoan Groups: • Euglenophyta • Euglena and others with chloroplasts and flagella • Pyrrophyta • Dinoflagellates that have bioluminescence • Chrysophyta • Diatoms with silica in their shells • Rhodophyta • Red algae • Phaeophyta • Brown algae • Chlorophyta • Green algae

  10. Euglenophyta, Chrysophyta, and Pyrrophyta http://www.urbanrivers.org/web_images/diatoms.gif http://www.sirinet.net/~jgjohnso/dinoflafellatestextb.jpg

  11. Red Algae - Rhodophyta • Red, green, purple or nearly black • Accessory pigments, mainly phycobilins • Most abundant in tropics • Commercial products • Agar • Nori http://www.ucmp.berkeley.edu/protista/reds/porphyra.gif

  12. Brown Algae- Phaeophyta • Olive-green, golden, or dark brown • Carotenoids and chlorophylls a, c1 , and c2 • Giant kelps are largest, most complex protistans http://www.diegoweb.com/diving/images/kelp.jpg

  13. Green Algae - Chlorophyta • Most similar to plants • Chlorophylls a and b • Largest number of species ( > 7,000) • Diverse • Chlamydomonas - single-celled, freshwater • Volvox - colonial, freshwater • Ulva - marine “sea lettuce” http://www.vattenkikaren.gu.se/fakta/arter/algae/mikroalg/halospp/halopas.jpeg

  14. The Fungus-like Protists:Parasitic and Predatory Molds • Resemble fungi • Chytrids (Chytridiomycota) • Water molds (Oomycota) • Slime molds (Acrasiomycota and Myxomycota)

  15. Slime Molds: http://focus.aps.org/stories/v6/st15/pic-v6-st15-1.jpg http://www.personal.psu.edu/users/c/m/cmr184/csm.jpg

  16. Protists and Our Phylogeny: Halophiles 4 Methanogens 3 Thermophiles Animals 2 9 Hetero. Protists 7 10 Fungi Photo. Protists 8 Plants Eubacteria 1 6 Eubacteria 2 1 5 Eubacteria 3 (hetero.)

  17. Lab Work: • Draw 3-4 protists from prepared slides.

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