PROTISTS PROTISTS COMMON EXAMPLES Amoeba paramecium euglena volvox

PROTISTS

PROTISTS COMMON EXAMPLES: Amoeba, paramecium, euglena, volvox, plasmodium EUKARYOTIC Have a nuclear membrane VERY DIVERSE GROUP most are unicellular, microscopic, aerobic Some are autotrophic, heterotrophic, sexual, asexual

PROTISTS DOMAIN EUKARYOTA KINGDOM PROTISTA Any eukaryote that is not classified as a fungus, plant, or animal is a PROTIST

PROTISTS ANIMAL-LIKE PROTISTS = PROTOZOA Classified by method of movement PLANT-LIKE PROTISTS = ALGAE Classified by pigment color FUNGUS-LIKE PROTISTS = MOLDS Classified by body form

PROTISTS PROTOZOA Heterotrophic Unicellular 4 groups

PROTISTS SARCODINA Aquatic Move by extending lobes of their cytoplasm called pseudopods (false feet) Example: Amoeba proteus

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PROTISTS CILIOPHORA Cilia for locomotion Larger than other protists Example: Paramecium

PROTIST

PROTISTS SPOROZOA Members cannot move All are endoparasites Example: Plasmodium – causes malaria

PROTISTS

PROTISTS PLANT-LIKE PROTISTS Most perform photosynthesis Contain chlorophyll in chloroplast and usually other pigments Divided into groups by pigment color Euglenophyta Green algae Red/brown/gold algae Dinoflagellages (clear)

PROTIST EUGLENOPHYTA Stigma (eyespot) - light sensitive Movement toward light using flagella; flagella pulls cell Example: Euglena; Volvox

PROTISTS

PROTISTS GREEN ALGAE Contain chlorophyll b is their main type (which is very similar to land plants) Many live in symbiotic relationships Lichen – organism composed of an algae and a fungi living together as one Example: Spirogyra

PROTISTS

PROTISTS

PROTISTS

PROTISTS Red/brown/gold algae Brown algae used as a thickening agent in toothpaste, pudding, ice cream; ex. Giant kelp

PROTISTS Gold algae is especially important in lakes, not true autotrophs because nearly all become heterotrophic in the absence of adequate light; ex. Diatoms

PROTISTS Dinoflagellates When agitated, undergo reaction that produces light bioluminescent Cause red tide

PROTISTS

PROTISTS FUNGUS-LIKE PROTISTS (MOLDS) Called “molds” because they are decomposers

PROTISTS IMPORTANCE OF PROTISTS ECOLOGICAL ROLES Provide an essential food base in aquatic food chains Carry out more than 30 -40% of Earth’s photosynthesis Protozoans help keep the number of bacteria in check