1. Protists

2. POINT > Identify 3 major groups of protists
POINT > Describe 4 types of “animal-like” protists
POINT > Describe 6 types of “plant-like” protists
POINT > Describe 3 types of “fungi-like” protists
POINT > Explain why protists are important in nature

3. Protist characteristics
All protists are eukaryotic Most protists are unicellular One of the first groups of living things (1.5 billion years ago) Protists are very important in ecological food chains Some protists cause disease in humans “Protists” are not really one group

4. POINT > Identify 3 major groups of protists
1. Animal-like Protists:
Animal-like protists:
1. Move on their own
2. Are heterotrophs (eat other organisms for energy)

5. POINT > Identify 3 major groups of protists
2. Plant-like Protists: Like plants, most plant-like protists do not move on their own and are autotrophs (use photosynthesis for energy)

6. POINT > Identify 3 major groups of protists
3. Fungi-like Protists:
Like fungi, these organisms are heterotrophs and get energy by decomposing dead organisms

7. CHECK:
Do protist cells have a nucleus? What are the three main groups of protists? Are most protists unicellular or multicellular?

8. POINT > Describe 4 types of “animal-like” protists
Animal-like protists are also called protozoans All animal-like protists are unicellular There are four groups: 1. Sarcodines : Example is amoeba Amoeba move using pseudopods Use pseudopods to capture food:

9. POINT > Describe 4 types of “animal-like” protists
There are four groups: 2. Ciliates : Example is paramecium Move using cilia M

10. POINT > Describe 4 types of “animal-like” protists
There are four groups: 3. Flagellates: Flagellates move using a whip-like structure, the flagella

11. POINT > Describe 4 types of “animal-like” protists
There are four groups: 4. Parasitic protists: Example Plasmodium doesn’t move on its own Plasmodium causes the disease malaria Malaria is transmitted by mosquito in tropical regions

12. CHECK:
What are the four groups of animal-like protists? How do amoeba move? How does a paramecium move? How does Plasmodium move? Are flagellates prokaryotic or eukaryotic? Are ciliates unicellular or multicellular? What protist causes the disease malaria?

13. POINT > Describe 6 types of “plant-like” protists
Plant-like protists can be unicellular or multicellular Plant-like protists are autotrophs: make their own food using light energy (photosynthesis) 70% of the Earth’s oxygen is produced by plant-like protists

14. POINT > Describe 6 types of “plant-like” protists
1. Euglena 2. Diatoms 3. Dinoflagellates 4. Red Algae 5. Green Algae 6. Brown Algae

15. POINT > Describe 6 types of “plant-like” protists
1. Euglena
Green color for photosynthesis
Can move using flagella
Live in fresh water
Can be a heterotroph under certain conditions
Eyespot: sensitive to light

16. POINT > Describe 6 types of “plant-like” protists
2. Diatoms
Diatoms have a glass-like cell wall with geometric shapes
Diatoms are used in toothpaste, car polish & reflective paint

17. POINT > Describe 6 types of “plant-like” protists
3. Dinoflagellates
Two flagella
Some can glow in the dark
Dinoflagellates can cause Red Tide: poisons from dinoflagellates kills fish

18. POINT > Describe 6 types of “plant-like” protists
4. Red algae
Multicellular “seaweeds”
Live in deep ocean waters
Common as food in some Asian and European countries

19. POINT > Describe 6 types of “plant-like” protists
5. Green algae
Most green algae are unicellular
Green algae can live in water and on land in wet places
Green algae are closely related to plants

20. 6. Brown algae
Brown algae can contain brown, green, yellow, orange and black pigments.
Giant kelp can be 100 meters long!
POINT > Describe 6 types of “plant-like” protists

21. CHECK:
What are the six groups of plant-like protists? Which type of plant-like protist causes Red Tide? Which type of plant-like protist can eat other organisms? Which type of plant-like protist has glass-like cell walls? Which group of plant-like protists do giant kelp belong to? Are most green algae unicellular or multicellular? Which plant-like protists live in very deep water?

22. POINT > Describe 3 types of “fungi-like” protists
Fungi-like protists are heterotrophs that get energy from dead organisms Fungi-like protists reproduce with spores: tiny cells that are able to grow into a new organism Fungi-like protists are both unicellular and multicellular

23. POINT > Describe 3 types of “fungi-like” protists
1. Water molds 2. Downy molds 3. Slime molds Live in water or wet places These molds attack some plants: Caused the Irish Potato Famine (1840’s)

24. POINT > Describe 3 types of “fungi-like” protists
Slime molds reproduce by fruiting bodies with spores
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25. CHECK:
What are two characteristics of fungi-like protists? What are the 3 groups of fungi-like protists? What is a spore? Are fungi-like protists autotrophs or heterotrophs?

26. POINT > Explain why protists are important in nature
Protists produce most of earth’s oxygen
Protists are the foundation for food chains in the oceans
Protists are important as decomposers

27. Homework:
Read pages
S.A. #1-3 page 235
GRAS pages 94-97
Finish Study Guide