1. Eukaryotes Unicellular or multicellular Very varied group
Kingdom Protista
Eukaryotes
Unicellular or multicellular
Very varied group

2. Colonies formed before multicellular Protists
Origin and Diversity
Probably formed by cells taking in prokaryotic cells and keeping them as organelles (Endosymbiosis)
Ex – mitochondria andchloroplasts were probably monerans that were captured
Colonies formed before multicellular Protists
Once cells were growing together, they eventually developed specialized functions.
These eventually became attached and relied on each other for those functions.
Kind of like people who live in groups – they become specialized and begin to rely on each other.

3. Protists are divided into three groups
Animal-Like Protists
heterotrophs
Plant-Like Protists
autotrophs
Fungus-Like Protists
Decomposers (heterotrophs that eat dead organic matter)

4. Animal-like protists Often called protozoans
Unicellular and don’t have specialized tissues, organs or organ systems. 1. Sarcodines
Amoebas – move using pseudopods

5. Other Animal-like Protists:
2. zooflagellates
Move using flagella
3. Ciliophorans
Move using cilia
These are paramecia
These are cilia
Paramecium dividing by binary fission
This is its oral groove

6. Paramecium structure
Oral groove

7. Other Animal-like protists 4
Other Animal-like protists 4. sporozoans –always parasites and no way to move on their own
Plasmodium is a parasite that you get from a mosquito bite. The disease it causes is malaria, which kills about 3 million people a year around the world. It lives in your red blood cells and destroys them.

8. Plant-Like protists 1. algae
Autotrophic – by photosynthesis
Commonly called algae or seaweed
Unicellular or multicellular
Unicellular: Diatoms and Euglenoids
Food for other organisms
Dinoflagellates cause red tides and some other harmful algae blooms in the oceans.

9. diatoms Diatoms – live in glass cases in fresh and salt water
Bottom of food
chain
Case made of silica
(glass-like)
Used for abrasives
and filters

10. euglenoids

11. Multicellular algae VOLVOX GREEN ALGAE RED ALGAE BROWN ALGAE
Volvox – colony of
Flagellated single cells
almost multicellular

12. Green algae
Predominant pigment is chlorophyll
Found in all types of water
Red algae
Grow in warm salt water
Some grow very deep in the ocean or on ice
Brown algae Mostly saltwater Grow in cool salt water Includes largest Protists

13. Fungus-like protists
Slime molds – creep along in an amoeba-like fashion (feed on decomposing organic matter)
Water molds
Mildews

14. Protists in the Biosphere
Some cause disease
Red tide
African sleeping sickness
Giardia
Potato blight
Malaria

15. Good uses of protists Plankton – bottom of the food chain
Food – carageenan, agar, algin –
thickeners and flavor enhancers
Seaweed as food
Diatoms for filters and as
abrasives
Indicators of the general health of the
environment