2009 Exam Key 3

2009 Exam Key 3 - NPB 102 Animal Behavior Winter 2009 Exam...

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1 NPB 102, Animal Behavior Name: _______________________________________________ Winter 2009 Exam 3 Student ID #____________________________________ Instructions: This exam has SIX PAGES, NONE OF THEM BLANK !! Make sure that your copy is complete before beginning. If you want us to be able to return your exam to you by leaving it in the hall boxes in Briggs hall, sign the authorization on this page . Read each question very carefully to be certain that you understand what is being asked. We will not answer any questions about the exam during the exam! Please do not come up to ask an instructor about any exam questions during the exam. If you believe a question is a bad question you may make a note on your exam for the instructors to consider. I hereby give the instructors of NPB 102 my permission to return my exam to me by leaving it in the hall boxes in Briggs Hall. Signature: ______________________________________________________________
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2 Multiple Choice : (1 pt each) Circle the letter of the one best choice to complete each of the following: 1) Pinealectomized, enucleated American Tree Sparrows exposed to long days for an extended period of time: a) Show no reproductive response to the long day stimulus. b) Show reproductive development, but never become photorefractory and therefore remain reproductive indefinitely. c) Show reproductive development and then also become photorefractory. d) Never become reproductive, and when tested with very long days turn out to already be photorefractory. e) None of the above. 2) Which of the following is an ultimate hypothesis regarding the role of circannual rhythms in regulating emergence from hibernation? a) Hibernators are insulated for months from virtually all external cues that could provide information about the optimal time to emerge from hibernation, so survival and successful reproduction requires an endogenous mechanism cueing emergence from hibernation. b) Hibernators possess an endogenous “circannual clock” in the brain that spontaneously signals an increase in metabolism and motivation to come above ground in spring. c) Increasing temperature in spring entrains an endogenous “circannual clock” in the brain so that the animal arouses from torpor and emerges above ground at the same time each year. d) All of the above. e) None of the above. 3) The best evidence that stonechats possess circannual rhythms is: a) Their reproductive physiology and plumage molt changes cyclically under constant photoperiod. b) They show cycles of reproductive physiology and plumage molt on constant photoperiod that drift out of phase with the real world. c) Their cycles of reproductive physiology and plumage molt on constant conditions remain perfectly synchronized with the real world. d)
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2009 Exam Key 3 - NPB 102 Animal Behavior Winter 2009 Exam...

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