1. Single Celled Organisms

2. A. All living things divided into 3 DOMAINS
1) Bacteria (prokaryote)
2) Archaebacteria (prokaryote = no nucleus)
3) Eukarya (all have nuclei)

3. B. Size of Cells
1. Bacteria and Archaebacteria are the smallest living things
(about the size of a mitochondria)
2. Eukariotic cells are much bigger.

4. 3. Bacteria Cells under our microscopes look like dots even under high power
Sketch some bacteria cells in your notes

5. C. Smallest Eukaryotic Organisms are: Protists
1. Called Protists bsc were first eukaryotes on Earth
2. Most are unicellular
single-celled organisms
3. A few like kelp and seaweed are multicellular
4. All have a nucleus and many membrane bound organelles (they are eukaryotes)
5. Some are animal-like, some plant-like, some fungus-like

6. D. Animal like Protists Called Protozoans Eat food for energy
Lack cell walls and chloroplasts
Can be grouped by locomotion

7. E. 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)

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

9. A) contractile vacuole B) food vacuole F) cilia G) oral grooveH

10. Paramecium

11. In your jar….

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

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

14. amoeba http://www.youtube.com/watch?v=pvOz4V699gk

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

16. Giardia…..hiker’s diarrhea

17. 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

18. 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

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

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

21. Euglena http://www.youtube.com/watch?v=jl0TzaWUQWk

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

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

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

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