1. The World of the Protista
Complicated Little Guys

2. Characteristics of Kingdom Protista
Very diverse
Eukaryotic
Mostly unicellular
Appeared about 1.5 bya
Formed by endosymbiosis

3. Classification of Protists
Animal like protists
Zooflagellates
Sarcodines
Ciliates
Sporozoans

4. Classification, con’t Plant like protists - Unicellular Euglenophytes
Chrysophytes
Diatoms
Dinoflagellates
Algaes – Multicellular
Red Algae
Green Algae
Brown Algae

5. Classification, con’t
Fungus-Like Protists
Slime molds
Water molds

6. Zooflagellates Swim using flagella Absorb food through cell membrane
Asexual and sexual

7. Sarcodines
Click to See Amoeba in Motion
Move and eat by PSEUDOPODIA – false feet – cytoplasm projections
Form food vacuoles
Reproduce by mitosis and cytokinesis
Foramnifera – have Calcium Carbonate
– White Cliffs of Dover

8. Ciliates Move with hair like projections called cilia
Use trichocysts for defense
Gullet and contractile vacuole
Macronuclei and micronuclei
Reproduce by conjugation and then mitosis
Click to see stalked ciliate
Click to compare flagella and cilia

9. Sporozoans Do not move on their own Parasitic Complex life cycles
Malaria has a vector - mosquito
Plasmodium – a sporozoan in
Blood – causes MALARIA

10. Other Protozoa Diseases
Trypanosome – African Sleeping Sickness
a zooflagellate – vector is tsetse fly
Amoeba – dysentery - Giardia

11. The Good Guys
Trichonympha – lives in gut of termite – digests cellulose into glucose

12. Plant Like Protists Live as autotrophs in light,
Click Here to see a Euglena Party
Live as autotrophs in light,
as heterotrophs in dark
Eyespot helps find light
Pellicle – fancy cell membrane
Reproduce by binary fission

13. Chrysophytes Golden Algae Store food as oil rather than starch
Sexual and asexual

14. Diatoms - Bacillariophyta
Cell walls rich in silicon
Two pieces like a petri dish

15. Pyrrophyta - Dinoflagellates
Some autotrophic, some heterotrophic
Can luminesce – Red Tides- toxic

16. Ecology 50% of photosynthesis on Earth from phytoplankton
Important in Ecosystems
Algae Blooms can deplete resources and disrupt equilibrium

17. The Algaes Red, Brown and Green
Have different proportions of chlorophylls
Brown Algaes are the giant kelps (Example: Sargassum)
Red Algaes important in coral reefs
Green algae most like plants- found all over – fresh and salt water

18. Algae

19. Reproduction – Green Algae

20. Human Uses of Algae FOOD
Treating ulcers, high blood pressure, arthritis
Products used in ice cream, pudding, etc.
Chemicals used to make plastics, paints, etc.
Agar for growing bacteria

21. Slime molds
Click to see slime mold