Protists! Miss Charney Northville Central School

So what are they anyways? Protists - eukaryotes that cannot be classified as animals, plants, and fungi They live in moist surroundings…usually water

GROUP ONE - Protozoans Parts of a Protozoan Cell Membrane - protects the cell and regulates what comes in and out of the cell Nucleus - place where genetic material is stored Cytoplasm - liquid found throughout the cell

GROUP ONE - Protozoans Parts of a Protozoan cont. Food Vacuole - where food is stored Contractile Vacuole - place where extra water is stored Pseudopod (Amoeba) - protozoan that moves with a [pseudopod] false foot

GROUP ONE - Protozoans Parts of a Protozoan cont. Cilia (Paramecium) - protozoan that moves with cilia (short hair-like structures) Oral Groove (Paramecium) - where the food enters Anal Groove (Paramecium) - where the food leaves Flagella - whip-like structures used in movement

Let’s go to the drawing board!

Differing Types of Protozoan Sarcodines - animal-like protists - protozoans with pseudopods Ciliates - move by cilia Flagellates - with flagella Parasites - feed off hosts

GROUP TWO - Algae Plant-like protists Autotrophs Chloroplasts - organelle that makes food by using sunlight

Dynamic Diatoms Glass-like organism found on the surface of water, or rocks in shallow water Need sunlight for photosynthesis. Die, sink to bottom --> diatomaceous earth Good polishing agent for household scouring products (Ajax, toothpaste)

Dinoflagellates Unicellular organisms surrounded by a “suit of armor” with 2 flagella They glow in the dark (ocean) Red tide - poison - chokes out oxygen for fish (S. America)

Euglenoids (Euglena) Unicellular green algae that are found in freshwater Primarily autotrophic (make own food) Can be animal-like in which they can be heterotrophic in certain conditions (no sunlight) Moves around by a flagellum Eyespot to help find light source

Varying Colors of Algae Red Algae - multicellular - found at low level in the ocean - not a plant Green Algae - unicellular and multicellular - scientists consider green algae to be plants (they are not) Brown Algae - multicellular - seaweed - form kelp forests

GROUP THREE - Fungus-like Protists Heterotrophic Have cell walls Use spores to reproduce