Protista
I. Protista A. Structure 1. Live in water 2. Huge variety A. Plant-like B. Animal-like C. Decomposers
3. Variety of sizes A. Microscopic the size 100 um to giant seaweed 100 m
4. Variety of shapes A. Symmetrical B. Asymmetrical
5. All are Eukaryotes A. Membrane bound nucleus B. Membrane bound organelles C. Can either be Multicellular or Unicellular
B. Origin and diversity 1. Been around for 1.5 BY 2. So many that we would need 20 kingdoms to correctly classify them
3. Easiest way to classify is by the way they eat A. Animal like- heterotrophs B. Plant like- autotrophs C. Fungus like- heterotrophic on dead matter
C. Animal-like Protists 1. Protozoan (4 types) Put into different categories by the way they move A. Sarcodinians (Can or Can not have Tests—Shells) Move by psuedopods “False Feet” Ex: Ameba No shell Can form a hard cyst for protection in a drought Causes dysentery
B. Zooflagellates 1. Has flagella for movement 2. Trichonympha live in the guts of termites a. Mutualistic
C. Ciliopharans 1. Most numerous and diverse 2. Cilia (hair like projections) 3. Fresh water 4. Form cysts in hard times 5. Mostly harmless, some can be parasitic Paramecium
D. Sporozoans 1. Parasitic protozoa's 2. Plasmodium (Malaria) Life cycles in both humans and mosquito's
D. Plant like 1.Divided into two groups. 2. Algae Multicellular Unicellular 2. Algae A. Perform photosynthesis 1. Contain chlorophyll
2. Unicellular Dinoflagellates-live in ocean and have 2 flagella
Diatoms-Cell walls, contain oil to float on water
Euglenoids-No cell wall, has chloroplasts and photosynthesize
3. Multicellular A. Parts that resemble plants Classified by color 1. Green Algae (chlorophyta) Chlorophyll b Mostly symbiotic Fresh water
2. Red Algae (Rhodophyta) Live in warm salt water Near surface or at depths of 260 meters Can collect light at great depths
3. Brown Algae (Phaeophyta) Cool salt water Giant kelp (100 meters long)
B. Reproduction of Algae Alternation of generations Alternate between sporophyte and gametophyte
C. Fungus-like MOLD 1. Characteristics A. Damp and watery places B. Break down dead matter C. Divided into slime molds or water molds
1. Plasmodium slime molds Single celled with many nuclei Can grow to be the size of the palm of your hand
Cotton like stuff on your food 2. Water molds Cotton like stuff on your food Few are parasites