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MidtermOne2010C KEY

MidtermOne2010C KEY - Latest revision 1:49 PM Name STUDENT...

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Latest revision: 2/1/10, 1:49 PM Name STUDENT ID Number FIRST MIDTERM EXAM KEY BIEB 166, Animal Behavior & Communication Winter Quarter, 2010 This exam should consist of 7 pages (including this top page); please check that your exam is complete. Sign your initials in the space provided on each page . Please write your answers only in the spaces provided on each page. You may use the back of the pages as a “scratch sheet," but we will not grade anything written on the back of the page. The exam has a total of 114 points; allot time to each question based upon its point value, and budget your time carefully. (You might want to leave a little time at the end for checking over your answers). PLEASE USE A PEN . ONLY EXAMS WRITTEN IN PEN CAN BE SUBMITTED FOR REGRADE REQUESTS! The exam will end at 1:50 pm. Good luck!
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BIEB 166: Animal Communication & Behavior Initials:____________________________ First Midterm Exam total student points on this page:______ 2 1) (12 pts) Please apply the concept of Tinbergen's Four Questions to what you learned in the paper “ Fatal attraction in rats ”. You must correctly place your answers in the categories of Proximate and Ultimate questions. Each type of question has a specific term associated with it. Please fill in the correct term in the blanks provided. Proximate (How does the parasite change a rat’s response to cat urine?) 1) ______________ Causation The parasite affects the rat’s brain (NMDA receptors are blocked) altering the rat’s fear of cats and may attenuate the 5-HT sensitive predator induced response. (Another possibility is that the cat urine is perceived as attractive.) 2) ______________ Development As the parasite develops inside the rat, it alters the rat’s brain. Note: unlike previous examples, attraction to cats or lack of fear of cats is not a natural behavior and thus it not simply a case of whether it is learned or innate. It is an open program in the sense that the rat’s behavior is subject alteration (by the parasite). Ultimate (Why does the parasite change a rat’s response to cat urine?) 3) ______________ Function The parasite then can continue its development in the cat host if the infected rat is consumed by a cat. 4) ______________ Evolutionary History Parasites that altered the behavior of their intermediate rat host had a higher rat of transmission to the next host than parasites that did not alter a rat’s attraction to cat urine.
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