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

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Presentation transcript:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

AP Biology Any Questions??