1. Protists

2. Protist Characteristics
An extremely diverse group
Eukaryotes
Mostly unicellular
some colonial
some multicellular
Some heterotrophic, some autotrophic, some both
Some have cell walls

3. 3 Major Types
Animal-like
protozoa
Fungus-like
Plant- like
algae

4. “Animal-Like” Protists
Protozoans
Are heterotrophs (some are parasites!)
Types of protozoans:
1. sarcodines
2. ciliaphore
3. flagellates
4. sporozoans

5. Protist Phyla
1. Sarcodines – use pseudopodia (“false feet”) to move and get food
EX: Amoebas, foraminifera. radiolarians

6.
Amoeba change forms continuously

7. 2. Ciliophores – use cillia to move
EX: paramecium

8.
Paramecia
- more ciliates

9. 3. Flagellates- have whip-like flagella

10.              This flagellate lives in termite gut – digests cellulose.

11. This one is a pathogen – causes diarrhea
EX: Giardia

12. Dinoflagellates have 2 flagella

13. A related protist, Leishmania, causes the disease leishmaniasis.
These protists are transmitted by biting flies, and are a serious public health problem in much of the world.

14. Leishamanasis

15. form spores, many are parasites
4. Sporozoans – no method of movement
form spores, many are parasites
EX:
- Toxoplasma- carried by rodents, birds, and domestic cats (can be harmful to unborn babies if mom changes the kitty litter box)
- Plasmodium- causes Malaria (carried by mosquitoes)

16. Life Cycle of Malaria

17. “Plant-like” protists
Are autotrophs
Mostly algae
Are classified by their pigments (their color) – red, green or brown
Many are multicelled
Do not have stems, leaves and roots like plants
Make up phytoplankton (bottom of ocean food chain)

18. Plant like protists

19. 1. Green Algae
Are green in color
Ex –
Spirogyra

20. Spirogyra

21. Desmid- unicellular green algae

22. Green algae - Volvox
             

23. Green algae - Haematococcus Turns birdbath red

24. 2. Red Algae Multicellular Commonly called sea weed
Live in deep salt water
Are used by humans to help make ice cream and hair conditioner
Are eaten in some Asian cultures

26. 3. Brown Algae Multicellular Commonly called sea weed
Thallus- plant-like seaweed body
Holdfast- root-like; anchors to surface
Stipe- stem-like
Blades- leaf-like
Have air-filled sacs called air bladders
Used in many foods and beauty products

28. Diatoms Photosynthetic protists Mostly marine
Have silica (glass-like) shell
Used to make reflective paint, toothpaste, and abrasives

29. “Fungus-Like” Protists
Slime & water molds
Some of these can move
Many are decomposers or parasites

30. Slime molds