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