Summarize the two different camps of thought on the life cycle of Pfiesteria. Which set of arguments do you find more appealing? Defend your answer. How would you go about resolving this controversy? What studies and/or findings are needed to help in this process? Given there is an active controversy in the scientific community on the Pfiesteria life stages, should public policy decisions be made when the scientific community is not in agreement? What would happen if action on this problem were delayed until the controversy was resolved? What if action were taken without all the "facts" known?

Steven spielberg's classic movie jaws was a thriller about a great white shark that terrorized tourists at a local beach. just before the shark's appearance, eerie music began playing. as the unseen shark came closer, the tempo of the music picked up. after the audience had experienced this a few times, the sound of the music triggered the emotional reaction of fear in the audience even though the shark still had not appeared. at that point, the sound of the eerie music was a: a) unconditioned response (ucr) b) conditioned response (cr) c) conditioned stimulus (cs) d) unconditioned stimulus (ucs)