1. Unicellular Adaptations-
Ms. Cuthrell

2. 1.2.3
Explain how specific cell adaptations help cells survive in particular environments (focus on unicellular organisms).

3. Bacteria vs. Protists Protists Bacteria
Unicellular; some multicellular
ALL eukaryotic- have a nucleus and membrane bound organelles
Bacteria
All unicellular
All prokaryotic- no nucleus or membrane bound organelles

4. Various Structures
Contractile vacuole- regulates osmosis so a cell does not gain to much water.
Found in many protists: amoeba, paramecia, euglena

5. Various Structures Cilia- hair-like projections (some protists).
Flagella- tail-like projections (some bacteria and protists).
Both used for locomotion (movement).

6. Various Structures
Pseudopods- extensions of the cytoplasm used for movement and feeding (amoebas).
Eyespots- detect changes in light (dinoflagellates and euglena).

7. Adaptive Behaviors
Chemotaxis- movement towards or away from chemicals.
E. Coli swims towards amino acids and sugars. (food)
Phototaxis- movement towards light.
Euglena and Cyanobacteria swims towards light to photosynthesize.
Seen in some bacteria and protists.