Protists - wsfcs.k12.nc.us

Protists - wsfcs.k12.nc.us

Unicellular Adaptations- 1.2.3 Explain how specific cell adaptations help cells survive in particular environments (focus on unicellular organisms). Bacteria vs. Protists Bacteria

All unicellular All prokaryotic- no nucleus or membrane bound organelles Protists Unicellular; some multicellular

ALL eukaryotic- have a nucleus and membrane bound organelles Diversity of Protist Kingdom http://www.dnatube.com/video/5361/The- Protist--Protozoa-Algae-and-Funguslikeprotists Various Structures

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

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

locomotion (movement). Various Structures Pseudopods- extensions of the cytoplasm used for movement and feeding (amoebas).

Eyespots- detect changes in light (dinoflagellates and euglena). 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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