1. Unicellular Organisms Learning Intention: Describe the general structure of unicellular organisms and the functions of cellular components and organelles.

2. General Characteristics 1. Eye spot- a spot that acts as a light receptor (sensor) 2. Contractile Vacuole- organelle that holds excess fluids. It periodically empties this into the cytoplasm. This forces water out of the cell

3. General Characteristics 3. Cilia – small hair like projections. Many extend from a cell. Single celled organisms use them for movement. They beat in one direction 4. Flagellum – very much like cilia, but are long and there are only a few per cell. Also used for movement http://www.youtube.com/watch?v=BbI 47l2nbDQ http://www.youtube.com/watch?v =Ey7Emmddf7Y

4. General Characteristics 5. Oral groove- Used to take up food. Cilia beat food particles toward oral groove

5. Amoeba  Food vacuole  Contractile vacuole  Nucleus http://www.youtube.com/watch?v=7pR7TN zJ_pA

6. Euglena  Contractile vacuole  Chloroplast  Nucleus  Flagellum  Whip like structure used for propulsion  Eyespot  Light sensitive pigment shield. Allows organism to respond to light. http://www.youtube.com/watch?v=J3sgoy2 2Ij4

7. Paramecium  Food vacuole  Nucleus  Oral groove  Funnel shaped groove food passes along to reach cell mouth  Anal pore  Specialised region of plasma membrane where undigested contents of food vacuoles is released