1. Protists
The first Eukaryotes

2. Protist Characteristics
1) Domain: Eukarya
(have a nucleus)
2) Most are unicellular
3) None have true tissues
(so not plant, animal or fungi)
4) Animal-like, Plant-like or Fungus-like

3. Animal like Protists Called Protozoans Heterotrophs
Lack cell walls and chloroplasts
Can be grouped by locomotion

4. Locomotion of Animal-like Protists
1) ciliates: move by cilia
2) amoebozoans: move by pseudopods
3) flagellates: move by flagella
4) apicomplexans: non-motile
(parasites)

5. Ciliates
All have many short hair-like cilia
Paramecium sp.

6. A) contractile vacuole B) food vacuole C) macronucleus D) micronucleus
E) pellicle F) cilia
G) oral groove H) gullet G H

7. In your jar….

8. Amoebozoans
Move by flowing cytoplasm into projections of cell membrane called pseudopods
false feet
Example: Amoeba
Not in ecojars

9. Amoeba Structures to know
A) nucleus
B) contractile
vacuole
C) food vacuole
D) pseudopod B C A D

10. Animal-like Flagellates
Move with few long hair-like structures
No chloroplasts
Trypanosoma sp. cause sleeping sickness
Tsetse fly vector

11. Giardia…..hiker’s diarrhea

12. Apicomplexans All are Parasites Don’t move on their own
Are carried by a vector
Plasmodium sp. cause Malaria
live inside human Red Blood Cells

13. Plant-like Protists Are photosynthetic & have chloroplasts
May have accessory pigments that make them red, brown, or gold
Unicellular types called phytoplankton
plant floater
Some are multicellular but lack tissues
May have flagella

14. Euglenophyta Can do photosynthesis and act as heterotroph
Green but lack cell wall
Move with flagella
Spinning motion
Eyespot detects
light

15. Euglena A) flagella B) eyespot C) chloroplast D) nucleus
E) contractile vacuole A B E C D

16. Diatoms Golden-yellow Algae Unicellular 2 silica shells
Important in phytoplankton food chain
Move by squirting out water
Diatomaceous earth

17. Dinoflagellates Some have armor-like plates Others are bioluminescent
Dinoflagellate blooms:
Caused by high N +P level
May result in Red tide
May result in Eutrophication
p127

18. Chlorophyta Green algae (chlorophyll) Most similar to plants
Unicellular …Desmids
Multicellular…filamentous algae & volvox

19. Brown Algae
Brown pigments absorb wavelengths of light that reach deeper into the water.
Largest multicellular algae
Sargassum kelp 

20. Sargasso Sea

21. Red Algae
Red pigments absorb wavelengths of light even deeper in the water. (green & blue)
Used to make thickeners & agar
Multicellular

22. Fungus-like Protists Water molds Slime molds
Major decomposers in forests and ponds