2011 Exam Key 3

2011 Exam Key 3 - NPB 102, Animal Behavior Winter 2011 Exam...

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1 NPB 102, Animal Behavior Name: _______________________________________________ Winter 2011 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) When pinealectomized, enucleated American Tree Sparrows are switched from short days to long days, held on the long days for an extended period of time, then exposed to short days for several weeks, and then re-exposed to long days again, they: a) Grow and then collapse the gonads when initially exposed to long days, and then maintain small gonads while on short days and when re-exposed to long days. b) Grow the gonads when initially exposed to long days, only collapse them when exposed to short days, and grow them again when placed back on long days. c) Grow and then collapse the gonads when initially exposed to long days, but fail to grow them again when switched from short days back to long days. d) Grow the gonads when initially placed on long days and then maintain enlarged gonads throughout the remaining treatments. e) Grow and then collapse the gonads when initially exposed to long days, maintain small gonads while on short days, and then grow the gonads again when placed on long days again. 2) Which of the following is an ultimate hypothesis regarding the mechanism responsible for hibernators knowing when to emerge from hibernation? a) Increasing soil temperature in the spring acts as a driving cue to terminate hibernation and emerge. 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) Hibernators use a “circa-lunar” clock that causes them to arouse monthly from torpor, actively check conditions above ground, and to return below ground and re-enter torpor for another month if conditions are not yet suitable for emergence. d)
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2011 Exam Key 3 - NPB 102, Animal Behavior Winter 2011 Exam...

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