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PROTISTS . Most diverse; 200,000 + species; wide variety of shapes, sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups: Protozoans Algae Fungus-Like. Protozoans.

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Most diverse; 200,000 + species; wide variety of shapes, sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Protozoans

  • Algae

  • Fungus-Like


Protozoans
Protozoans sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

Animal-like protists –unicellular heterotrophs that feed on other organisms or dead organic matter; Grouped based on movement; 4 types


Sporozoans
Sporozoans sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Parasitic (nonmotile)

  • Produce spores

  • ExamplePlasmodium falciparum

    (causes Malaria)


Amoebas
Amoebas sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Pseudopodia for movement

  • Blob-like

  • Most marine (few freshwater—oozes, wet moss, & moist soil)

  • Asexual Reproduction

  • 2 types:

    • Foraminiferans – calcium carbonate shells

    • Radiolarians – silica shells


Single-parent produces 1 or more identical sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:offspring; this is called __________________


Flagellates
Flagellates sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Move by whipping flagella from side

    to side

  • Parasitic

  • Examples

    • In termite intestines

    • Giardia lamblia(causes giardiasis = water-borne diarrhea)


Ciliates
Ciliates sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Move by beating cilia

  • Most complex Protozoans

  • Example

    • Paramecia


Algae
Algae sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Plant-like Protists

  • Photosynthetic

  • Unicellular & multicellular species

  • Produce more than ½ the Earth’s oxygen

  • 6 Phyla


Euglenoids
Euglenoids sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Unicellular; Aquatic w/traits of plants & animals

  • Most have chlorophyll (photosynthesis)

  • Move by using 1 or 2 flagella

  • Autotrophic or heterotrophic

  • Euglena sp.

Phacusacuminatus


Diatoms
Diatoms sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Golden Algae; Unicellular w/ Silica shells

  • Shaped like a pillbox

  • Photosynthetic Autotrophs

  • Marine & some freshwater

  • Asexual & sexual reproduction

  • Contain chlorophyll & carotenoids


Diatom reproduction
Diatom Reproduction sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Asexual – box splits & each half make new half

  • Sexual -- gametes


Dinoflagellate
Dinoflagellate sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Spinning Algae

  • Unicellular; thick cellulose plates in cell walls

  • 2 flagella (causes spinning)

  • Most marine; some bioluminescent

  • Contain chlorophyll, carotenoids, red pigments

  • Toxins – red tides – can be lethal– harvesting of shellfish banned


Red algae
Red Algae sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Red Seaweed

  • Multicellular; chlorophyll & phycobilins (red & blue pigments)

  • Marine Tropical or Cool Rocky Coasts


Brown algae
Brown Algae sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Kelp; many w/air bladders to keep afloat near surface

  • Multicellular

  • Contain chlorophyll, yellowish-brown carotenoid (fucoxanthin)


Green algae
Green Algae sizes, & colors; Unicellular (amoeba) & Multicellular (seaweed); All Eukaryotic; can be jellylike, rigid, or colonial; 3 groups:

  • Unicellular & Multicellular & Colonial (seaweed Volvox colony hollow ball made of 100’s of flagellated cells in single layer)

  • Chlorophyll & some have yellow pigments



Fungus like protists
Fungus-like trunks, snow, & in fur of slothsProtists

  • Multicellular

  • Form delicate, net-like structures on surfaces of food supplies

  • 3 Phyla


Slime molds
Slime Molds trunks, snow, & in fur of sloths

  • Colorful (yellow/orange to blue, violet, jet black

  • Animal-like = engulf food like amoebas

  • Reproduce by spores

  • 2 main types: Plasmodial & Cellular


Plasmodial slime molds
Plasmodial trunks, snow, & in fur of sloths Slime Molds

  • Form plasmodium for movement & for reproduction

  • Moves by amoeboid action (creeps along)

  • Forming netlike structure on surfaces of decaying logs/leaves

  • Multiple nuclei

  • Spore reproduction in dry

    conditions


Cellular slime molds
Cellular Slime Molds trunks, snow, & in fur of sloths

  • Food plentiful – individual haploid, amoeboid

  • Food scarce – form multicellular mass w/distinct cell membranes

  • Divide by regular cellular division

  • Tend to be microscopic


Water molds downy mildews
Water Molds & Downy Mildews trunks, snow, & in fur of sloths

  • Live in water or moist places

  • Decomposers & parasites


Water molds
Water Molds trunks, snow, & in fur of sloths

  • Look like fuzzy, white growths on decaying matter

  • Grow as mass of threads

  • Produce flagellated reproductive cells


Downy mildews
Downy Mildews trunks, snow, & in fur of sloths

  • Parasitize plants

  • Some cause plant diseases


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