MidtermTwo2008Key - Latest revision: 2/26/08, 8:31 AM Name...

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Latest revision: 2/26/08, 8:31 AM Name STUDENT ID Number 2nd MIDTERM EXAM KEY Winter Quarter, 2008 This exam should consist of 8 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 130 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 5:50 pm. Good luck!
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Initials:____________________________ Second Midterm Exam: February 25, 2008 Page 2 of 8 total student points on this page:______ 1) In lecture, we said that Referential Communication is communication that provides information about the external environment in a coded way. We also explained that communication needed to meet two specific criteria to qualify as referential. Please list these two criteria and explain what they mean: a) (4 pts)____ Stimulus class specific ___ The communication is specific to the environmental information, event, or item being signaled. b) (4 pts)_____ Context independent ______ The communication has the same meaning, regardless of the context the receiver is in. This also means that the sender signals and the receiver responds appropriately without the direct presence of what is signaled. 2) (8 pts) Please explain how a honey bee forager referentially communicates the following two parameters to nestmates: a) Distance Distance is encoded in the duration of the waggle run. It is encoded in the waggle sound, tactile contact with the waggle dancer, the physical distance covered by the waggle runner, the number of waggle runs per unit time, etc. The greater the length or duration of the waggle run, the greater the distance. b) Direction Direction is encoded in the angle of the waggle run relative to gravity. Inside the nest, the up direction corresponds to the sun's azimuth and the angle is appropriately transformed. When the dancer is outside on a horizontal surface and can see the sun or a patch of blue sky, the waggle run points directly in the direction of the food source. 3)
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This note was uploaded on 08/19/2010 for the course BIEB BIEB 166 taught by Professor Nieh during the Winter '06 term at UCSD.

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MidtermTwo2008Key - Latest revision: 2/26/08, 8:31 AM Name...

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