1. Protists Amoeba proteus Euglena gracilis Pediastrum boryanum
Amoeba proteus
Plasmodium falciparum
Euglena gracilis
Paramecium aurelia
Pediastrum boryanum

2. What is a Protist?
Eukaryote = membrane bound organelles (ex: they have a nucleus)

3. What is a Protist?
Most unicellular, some multicellular

4. What is a Protist?
Autotrophs and heterotrophs

5. What is a Protist?
Most reproduce asexually, some reproduce sexually

6. What is a Protist? Found in water/moisture
Some have a cell wall, some do not
Some are considered parasites

7. What is a Protist?
Some have a cell wall, some do not
Green Algae

8. What is a Protist? Some are considered parasites Giardiasis
African Sleeping Sickness (or Trypanosomiasis)
Protist: Trypanosoma Vector: Tse Tse Fly
Statistics:
Occurs mostly in sub-saharan africa
Symptoms include fever, headaches, pain in joints -followed by a phase when the parasite infects the central nervous system, causing confusion, lack of coordination, and uncontrolled sleepiness. Without treatment, the host will die
Giardiasis
Protist: Giardia Transmission: Drinking contaminated water (usually outdoor streams and other untreated water) Symptoms: Severe diarrhea and vomitting, the protist takes up residence in the digestive tract.
Giardiasis
African Sleeping Sickness (Trypanosomiasis)

9. Asexual Reproduction
Binary fission – 1 organism becomes 2 identical organisms

10. Asexual Reproduction
Multiple fission – 1 organism becomes many identical organisms

11. Sexual Reproduction
Conjugation – transfer of genetic material through direct contact
Some involve exchange of gametes (sex cells)

12. How do we classify protists?
We classify protists based on how they obtain nutrition:
Plant-like: autotroph
Animal-like: heterotroph
Fungus-like: decomposer

13. Algae Plant-like Protists Autotrophs (photosynthesis)
Do not have roots, stems or leaves
Algae

14. DIATOMS Plant-like Protists Unicellular Live in fresh water
“Hollow glass boxes”
Colorful

15. EUGLENAS Plant-like Protists Unicellular Live in fresh water
Have one eye spot to detect sunlight
Can also eat bacteria
Have flagella

16. DINOFLAGELLATES Plant-like Protists Unicellular Live in fresh water
Have two flagella
One spins
Other for propulsion

17. GREEN ALGAE Plant-like Protists Found in shallow waters
Ex: Sea Lettuce

18. Plant-like Protists
BROWN ALGAE
Found in arctic waters
Ex: Kelp

19. RED ALGAE Plant-like Protists
Grows at greater depths than brown and green algae

20. Animal-like Protists
Heterotrophs
Protozoans

21. CILIATES Animal-like Protists Move using small hairs (cilia)
Eat bacteria
Reproduce by fission
Unicellular
2 nuclei
Ex: Paramecium

22. FLAGELLATES Animal-like Protists Move with one or more flagellum
Eat bacteria
Unicellular
Ex: Giardia

23. PSEUDOPODS Animal-like Protists Means “false feet” Unicellular
Looks like a “blob”
Ex: Amoeba

24. CAN’T MOVE Animal-like Protists Can’t move independently Parasites
Ex: Plasmodium which causes Malaria (lives in the bloodstream)

25. Fungus-like Protists
Heterotrophs / decomposers

26. FUNGUS-LIKE PROTISTS Fungus-like Protists
Produce spores for reproduction
Ex: slime molds, water molds

27. Diseases caused by Protists
Amebic dysentery
Gut infection caused by amoebas
Trypanosomiasis
African “sleeping sickness”
Transmitted by tsetse fly
Chagas’ disease
Transmitted by “kissing bug”

28. Diseases caused by Protists
Leishmaniasis
Can be fatal
Transmitted by sand flies
Giardiasis
Transmitted by animal feces in contaminated water
Plasmodium
Malaria

29. Diseases caused by Protists
Diseases caused by protists may be treated with antiprotozoal agents