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Unicellular Adaptations-

Unicellular Adaptations-. 1.2.3. Explain how specific cell adaptations help cells survive in particular environments (focus on unicellular organisms). . Bacteria All unicellular All prokaryotic- no nucleus or membrane bound organelles. Protists Unicellular; some multicellular

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Unicellular Adaptations-

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  1. Unicellular Adaptations-

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

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

  4. Diversity of Protist Kingdom • http://www.dnatube.com/video/5361/The-Protist--Protozoa-Algae-and-Funguslike-protists

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

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

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

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

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