Protists

Protists are single or multi-celled organismsThat live in wet environments.

They have eukaryotic cells

They reproduce asexually.

The biggest difference between protists is how they get food.

Protists can be:

1. Animal-like (get food from outside source)

2. Plant-like (make own food)

3. Fungus-like (digest decayed material)

Animal-like Protists are known as protozoa.

They live in many different places. Some are parasites, which means that they live on orin another organism.

Animal-like protists are put into different groups based on how they move.

A. Rhizopods- move using pseudopods, which are arm-like extensions of their cytoplasm

Ex. Amoeba

An amoeba may never have the same shapetwice!

B. Flagellates - move using a whip-like tailcalled a flagella

Ex. - Trypanosoma

Flagellates may have one or more flagella.

C. Ciliates - move by waving short, hair-likestructures called cilia

Ex.- Paramecium

D. Sporozoans - have no way of moving on their own, so they are parasites that livein and feed on animal blood; can be disease-causing

Ex.- malaria

Plant-like Protists all make their own food usingsunlight.

They are green because they contain Chlorophyll.

The process of making their own food is calledPhotosynthesis.

Plant-like protists are known as algae.

Plant-like Protists are grouped by how theystore food and by color.

A. Euglenas -1. Have an “eyespot” that is light sensitive2. Can make or get food3. Most move with flagella4. One-celled

B.Diatoms - 1. Make own food 2. One-celled 3. Store food as oil 4. Covered by a shell

C. Dinoflagellates -1. Move in a spinning motion2. Store food as starch and oil3. Live in saltwater

D. Green Algae -1. One or many celled2. Stores food as starch3. Live in many environments

E. Red Algae -1. Most are many-celled2. Used as a “thickener” in products

F. Brown Algae -1. Many-celled2. People eat this

Fungus-like Protists get energy bydecomposing dead or decaying materials.

A. Slime molds -1. Can move using pseudopods2. Live in moist, shady places

B. Water molds and Mildew -Grow as a mass of threads over theorganism they are feeding on