Regents Biology Domain Bacteria Domain Archaebacteria Domain Eukaryotes Common ancestor Protists Simple Eukaryotes

Regents Biology General characteristics  Classification criteria  eukaryotes  not animal, plant or fungi That’s more of what they’re not & not what they are!

Regents Biology Protist Diversity  A great variety in ways of life  one-celled to many-celled  autotrophs (photosynthesis) to heterotrophs (have to eat)  asexual to sexual reproduction  pathogens to beneficial  sessile to mobile

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

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

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

Regents Biology Protist Diversity  Parasitic & pathogen Protists  malaria  Giardia  trypanosomes Plasmodium Giardia Trypanosoma

Regents Biology Protist Diversity  Beneficial & necessary Protists  phytoplankton  small algae + diatoms  much of the world’s photosynthesis  produces ~90% of atmospheric oxygen  zooplankton  heterotroph protists  key ecological role at base of marine food web Mmmmmm! Keeps me goin’!

Regents Biology Any Questions??