1. 2.3 The Protists Learning Goals:
Describe characteristics of eukaryotes
Describe theories of the origin of eukaryotes (e.g., endosymbiosis)
Describe the diversity of protists (in number of cells, types of metabolism, reproduction, etc.)
Key features of the cilitates (e.g. Paramecium), euglenoids (e.g., Euglena), amoebas
Reproduction of unicellular protists (binary fission, conjugation)

2. General Characteristics
Eukaryotes
Unicellular
Mostly aerobic
Lack specialized features
No embryos or complex sex organs
Some are motile
Live in water or moist environements

3. General Characteristics
Most diverse group of eukaryotes
How is Kingdom Protista mainly classified in comparison to the other Kingdoms?
Classified together because they do not fit into other kingdoms and not based on their similarities

4. One reason protists are important
Surface waters of oceans and lakes have an abundance of protists called diatoms
They are the leading primary producers in oceans and are the basis for marine and freshwater food chains.

5. Main Groupings

6. (1) Animal-like Protists
Also called protozoans
They are heterotrophs
Some are parasites
E.g. amoeba, ciliates, flagellates

7. (1) Animal-like Protists
They are classified by the way they move:
(i) CILIA
Cilia are hair-like projections which beat together like oars to push the protist through its environment.
National Human Genome Research Institute. Retrieved on July 30, 2010 from Public Domain Access

8. (1) Animal-Like Protists
(ii) FLAGELLA
Flagella are tail like projections which rotate like a propeller

9. (1) Animal-like Protists
(iii) PSEUDOPODS
Temporary projections which push its body in a particular direction.
The fluid within the cell is pushed against the cell wall which causes it to extend.

10. (2) Plant-like Protists
E.g. euglenoids, diatoms, dinoflagellates
They make their own food by photosynthesis.

11. (3) Fungus-like Protists
E.g. slime molds and water molds
They consume nutrients from living or dead organisms (decomposers)
Some water molds are parasites

12. Homework Read pg. 60-64 and 66 Pg. 66 – Research This (omit 1)
Kingdom Protista Worksheet (in pkg)