Unicellular Adaptations-

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Unicellular Adaptations-
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1.2.3

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

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Bacteria vs. Protists

• Protists
• Unicellular some multicellular
• ALL eukaryotic- have a nucleus and membrane bound
  organelles

• Bacteria
• All unicellular
• All prokaryotic- no nucleus or membrane bound
  organelles

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Diversity of Protist Kingdom

• http//www.dnatube.com/video/5361/The-Protist--Pro
  tozoa-Algae-and-Funguslike-protists

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Various Structures

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

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Various Structures

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

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Various Structures

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

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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.