Protist Protist NotesNotes

p. 468

ProtistsProtists

Eukaryotes (have nucleus)Eukaryotes (have nucleus) Most unicellular (made of only 1 cell)Most unicellular (made of only 1 cell) Many kindsMany kinds

I. Animal-Like Protists I. Animal-Like Protists (Protozoans)(Protozoans)

Heterotrophs (can’t make own food)Heterotrophs (can’t make own food) Most able to move aroundMost able to move around UnicellularUnicellular Types:Types:

1.1. Protozoan with PseudopodsProtozoan with Pseudopods(Sarcodines)(Sarcodines)

Pseudopod – “false foot” or bulge of Pseudopod – “false foot” or bulge of cytoplasm used to move/feedcytoplasm used to move/feed

Example: Example: AmoebaAmoeba

2. Protozoans with Cilia 2. Protozoans with Cilia (Ciliates)(Ciliates)

Cilia – hairlike projections that move Cilia – hairlike projections that move like waves, used to move or get foodlike waves, used to move or get food

Example: Example: ParameciumParamecium

3. Protozoans with flagella 3. Protozoans with flagella (flagellates)(flagellates)

Flagella – long, whiplike “tail”Flagella – long, whiplike “tail” Symbiosis – relationship where at Symbiosis – relationship where at

least one partner benefitsleast one partner benefits Mutualism – relationship when both Mutualism – relationship when both

partners benefitpartners benefit Parasite – relationship when one Parasite – relationship when one

partner harms another (its host)partner harms another (its host)

4. Protozoans that are 4. Protozoans that are parasitesparasites Feed on the cells/body fluids of their Feed on the cells/body fluids of their

hosthost

II. Plantlike ProtistsII. Plantlike Protists

Autotrophs (make own food using Autotrophs (make own food using sun’s energy)sun’s energy)

AlgaeAlgae Important food sourceImportant food source Contribute oxygenContribute oxygen Many pigments (chemicals that Many pigments (chemicals that

produce color)produce color)

1. Diatoms1. Diatoms

UnicellularUnicellular Dead used asDead used as

PolishPolish ScouringScouring insecticideinsecticide

2. Dinoflagellates2. Dinoflagellates

UnicellularUnicellular 2 flagella2 flagella Some glow in darkSome glow in dark

3. Euglenoids3. Euglenoids

GreenGreen Heterotrophs when no sunHeterotrophs when no sun Example: Example: EuglenaEuglena

4. Volvox4. Volvox

VolvoxVolvox are round are round They live in coloniesThey live in colonies autotrophicautotrophic

5. Green Algae5. Green Algae

Most unicellularMost unicellular Found in water or landFound in water or land

6. Brown Algae6. Brown Algae

Most seaweedsMost seaweeds Color: green, yellow, Color: green, yellow,

orange, or brownorange, or brown Live in waterLive in water Some used as foodSome used as food

1. Slime molds1. Slime molds

Bright colorsBright colors Vary in sizeVary in size OozeOoze

2. Water mold/downy 2. Water mold/downy mildewmildew Live in water/moist placesLive in water/moist places Example: water mold that killed Irish Example: water mold that killed Irish

potato crops (1845, 1846)potato crops (1845, 1846)