2. AP Biology Domain Bacteria Domain Archaea Domain Eukarya Common ancestor Protists Domain Eukarya

3. AP Biology General characteristics  Classification criteria  eukaryotes  not animal, plant or fungi

4. AP Biology Great Diversity dinoflagellates & ciliates euglenoids brown algae & diatoms red algae green algae miscellaneous?

5. AP Biology Problems with Protist Classification  Too Diverse! Euglenozoa Animals Streptophyta (includes land plants ) Choanoflagellida Fungi Chlorophyta Rhodophyta Stramenopila Alveolata Archaea Bacteria

6. AP Biology Theory of Endosymbiosis Ancestral eukaryotic cell Eukaryotic cell with mitochondrion internal membrane system aerobic bacterium mitochondrion chloroplast Eukaryotic cell with chloroplasts photosynthetic bacterium Paramecium & symbiont Chlorella

7. AP Biology Protist Diversity  The full spectrum of modes of life  from unicellular to multicellular  autotrophic to heterotrophic  asexual to sexual reproduction  pathogenic to beneficial  sessile to mobile

8. AP Biology Mobility  How Protists move  flagellum  cilia  pseudopod

9. AP Biology Protist Diversity  Animal-like Protists  heterotrophs, predators  Amoeba  Paramecium  Stentor Paramecium with food vacuoles stained red Amoeba ingesting a Paramecium

10. AP Biology Protist Diversity  Excavata  Modified mitochondria  Unique flagella  GiardiaTrypanosoma

11. AP Biology Protist Diversity  Chromalveolata  Photosynthetic  Parasitic  Kelp  Plasmodium  Diatoms

12. AP Biology Protist Diversity  Rhizaria  Thread-like pseudopods  Predators  Amoeba

13. AP Biology Protist Diversity  Archaeplastida  Photosynthetic  Closely related to plants  Seaweed  Volvox

14. AP Biology Protist Diversity  Unikonta  Tube shaped pseudopods  Closely related to animals  Amoeba  Slime molds

15. AP Biology Protist Diversity  Plant-like Protists  autotrophs, photosynthesis  Euglena  algae  diatoms

16. AP Biology Protist Diversity  Parasitic & pathogenic Protists  malaria  Giardia  trypanosomes Plasmodium Giardia Trypanosoma

17. AP Biology Protist Diversity  Beneficial & necessary Protists  phytoplankton  small algae + diatoms  much of the world’s photosynthesis  produces ~90% of atmospheric oxygen  zooplankton  heterotrophic protists +  key ecological role at base of marine food web

18. AP Biology Any Questions??