Protists! Miss Charney Northville Central School.
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Transcript of Protists! Miss Charney Northville Central School.
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 - ProtozoansParts 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 ProtozoanSarcodines - 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