Kingdom Protista

Kingdom Protista

• Is considered to be the “junk drawer” kingdom since it’s very diverse.

• All are eukaryotes (with nuclei) that live in moist surroundings.

There are ? types of protists.

3

1. Animal-like Protists(Protozoans)

• Move place to place to obtain food

• Single-celled (unicellular)

• There are 4 types of Protozoans:

• Ones with psuedopods(pseudo=false, pod=foot)

• These organisms allow their cell membranes to bulge out so they can move.

1. Sacrodines

1. Sacrodines• An example is an amoeba.

• Amoebas have a contractile vacuole; structure that collects extra water and expels it from cell.

2. Ciliates

• Contain cilia or hair-like projections from the cell.

• Example: paramecium

3. zooflagellates

• Have 1-8 whip-like tails called flagella.

• Example: Giardia

4. Sporozoans

• Parasites that feed on cells/body fluids of hosts.

• Example: Plasmodium (causes malaria)

2. Fungus-like Protists

• Like fungus, fungus-like protists are heterotrophs, have cell walls, and use spores to reproduce. But unlike fungi, these guys at some point can move.

Fungus-like protists

• Examples:

• water molds (grows as tiny threads for a fuzzy covering), downy mildews, and slime molds (bright colored, feed on decaying plants.

3. Plant-like Protists

Algae-all are autotrophs like plants, most O2 comes from these organisms, they vary in size.

Plant-like Protists

• Euglenoids – green unicellular algae found in freshwater. They have long flagellum.

• Dinoflagellates – unicellular algae covered in “stiff plates”, 2 flagella, many glow in dark

Plant-like Protists• Diatoms – unicellular with glass-like

walls, support the aquatic ecosystem.

Plant-like Protists

• Green algae – uni- and multicellular, green pigments.

Plant-like Protists

• Red algae – almost all are multicellular seaweeds, some can live below 260 meters in the ocean. Carrageenan comes from red algae and is used in making ice cream and conditioner.

Plant-like protists

• Brown algae – Giant kelps, brown, yellow, and orange pigments.

• Orange pigments help make salad dressing and pudding.

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