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Name ________________________________________ Bozeman – Evolutionary Significance of Cell Communication Directions: Watch the following Paul Anderson video on cell communication and answer the related questions. http://www.youtube.com/watch?v=FsGwgiIv_NU&feature=youtu.be 1. How do the bobtail squid and the bacteria Vibrio fischeri demonstrate an example of mutualism? 2. How does cell communication exist between single celled organisms like bacteria? 3. How does cell communication exist within a multicellular organism? 4. Why is it significant that signal transduction pathways are almost identical in both single-celled and multicellular organisms? How does this relate to evolution? 5. How do planktonic Vibrio fischeri differ from colonial organisms of the same species in terms of their behavior? 6. What are “autoinducers”? 7. What is the significance of autoinducers being produced when populations of Vibrio fischeri are large? 8. What does the enzyme “luciferase” do? 9. In summary, how do bacteria take a count of themselves, also known as “quorum sensing”? 10. What does it mean to say that the adrenal glands participate in the “fight or flight” response? 11. Explain the signal transduction pathway involving epinephrine to ultimately produce an effect where sugar becomes available to give energy in emergency situations.