Protists Unit 3

Pond water video reflection- IN: After watching the video clip “Pond Water” respond to the following: List & describe three things you already know about protists, algae and fungi. List & describe three things you would like to know about these topics.

General Characteristics of protists 1. Eukaryotes 2. Plant-like, animal-like or fungus-like 3. Grouped by how they feed: heterotrophs, autotrophs and decomposers 4. Protista= the very first 5. Uni and Multicellular 6. Some Colonial Count how many protists in the picture are autotrophs. How do you know which ones to count?

Animal-like protists Heterotrophic “AKA” protozoans Unicellular Classified by method of movement Some are immobile and they are parasitic How do these move? How do you know this one is not a protist?

Plant-like & Fungus-like Protists “AKA”- algae Classified according to color Uni and multicellular Autotrophic Ex. Volvox Is it a plant? “AKA” mold A water mold caused Great Potato Famine causing large increases in Irish immigration to US Classified according to reproductive structures and habitat water & slime molds

Phyla: Sarcodina Move with pseudopods: “false feet” Heterotrophic-they engulf food (endocytosis) with pseudopods forming food vacuoles Freshwater or marine, moist soil Usually harmless Reproduce asexually by splitting in half: binary fission Ex. Amoeba and Forminaferan Binary fission

Food vacuole Nucleus Contractile vacuole Pseudopods Section 20-2 Figure 20-4 An Amoeba Go to Section: AmoebaLabel your amoeba on your notes!!!

Phyla: Zooflagellates Have one or more flagella which move back and forth Absorb food Some decomposers, some parasites Live in moist environments, freshwater or host cell

Ciliophora Move by cilia Heterotrophic Freshwater or marine Ex. Paramecium

Phylum: Sporozoa No movement in and of itself. Uses host system for movement Ex. Circulatory sys. Heterotrophic parasite Habitat: host Ex. Plasmodium

Beneficial Protists Can be free- living: flagellate which lives in termite gut helping them to break down the cellulose in wood What type of symbiosis exists between the termite and the protist?? Trichonympha

Quiz # 1: Protozoans 1.All protists are ___. a. eukaryotes b. photosynthetic c. prokaryotes 2.Animal-like protists are called ___. a. algae b. decomposers c. protozoans 3.An amoeba moves and engulfs its food with ___. a. cilia b. pseudopods c. flagella 4. A ___ pumps out excess water. a. contractile vacuole b. food vacuole c. water vacuole 5.A zooflagellate uses ___ to move from place to place. a. cilia b. pseudopod c. flagella