Exam 1 Key

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BIOSCIENCE II FIRST EXAM

This exam is a closed-book exam. You are not to use any materials nor receive or give any assistance to another student while taking the exam. You are not to discuss the exam with any student in other sections of this course until the graded exams are returned. Violation of these stipulations will result in a grade of zero on your exam. You are expected to be familiar with the University's honor code and will adhere to that code and be bound by its prescriptions.

1.

You are to use an unwrinkled, ParSCORE scantron.

2. Enter your name in the space provided on your scantron and darken the corresponding slots. Enter your eightdigit Banner ID number in first eight spaces of the "I.D. Number" field on your scantron and darken the corresponding slots. Leave the remaining rectangles blank. 3. 4. 5. 6. Darken the space on your scantron corresponding to you exam form.

FORM A

Darken the slot corresponding to your test form in the space provided on your scantron. There should be no extraneous marks on your scantron; erasures should be clean. Calculators may not be used.

7. There is a time limit on this exam. You will have xxxxx (00) minutes to complete the exam. This xxxxxminute period will begin to run when the class is so instructed. Therefore, should you arrive late to the exam, you will still have to turn in your exam by the expiration of that same xxxxx-minute time period. THE EXAM MUST BE PASSED IN BY THE END OF CLASS IN ORDER FOR IT TO BE GRADED. 8. Pick the one best answer and mark the corresponding entry on your scantron with a number 2 pencil AND INDICATE YOUR SELECTION ON YOUR EXAM BOOKLET. 9. Pass in your scantron; keep your exam booklet. be graded. Your scantron is the only record of your responses that will

FIVE POINTS WILL BE DEDUCTED FOR EACH OF THE ABOVE DIRECTIONS THAT IS NOT FOLLOWED COMPLETELY TURN OFF ALL CELL PHONES, AUDIO HEADSETS, PAGERS AND ANY OTHER ELECTRONIC SIGNALING DEVICE

COMPLETED EXAMS MUST BE IN THE PROCTOR’S/PROFESSOR’S POSSESSION BY THE END OF TIME ALLOTTED FOR THE EXAM. EXAMS NOT PASSED IN BY THE APPOINTED TIME MAY NOT BE GRADED AND THEREFORE MAY RESULT IN A GRADE OF ZERO (0) ON THE EXAM

1 Bonsai trees, like the one to the right, have been nurtured over many generations by Japanese gardeners. a. The adjustments made to the phenotypes of the trees are not heritable* c. The genetic changes that have occurred, while resulting in interesting and attractive phenotypes, inadvertently have also been responsible for the evolution of varieties that are highly susceptible to pathogens. d. The shape and size of the plants represents the result of artificial selection.

2 The figure to the right describes the evolution of drug resistance in HIV where the drug is a reverse transcriptase inhibitor. Notice that all three colored lines begin on the left axis at a point above 0% of HIV resistant to 3TC. What is the significance of the observation that the number is greater than zero? a. apparently prior to the appearance of HIV in human populations, some humans had a characteristic that preadapted them to survive upon exposure to the virus. b. in a population of HIV viral particles, a small proportion are of a genetic type that they are not effected by the drug.* c. as soon as the human population became exposed to HIV, some individuals adapted to the situation d. that is probably just a sampling error e. upon exposure to the drug, some viral particles adapt by mutation to a form that can thrive in the face of the drug. 3 The authors of our textbook describe a study in Chapter 1 that investigated the relationship between warningly colored and venomous coral snakes and their non-venomous kingsnake mimics. David Phennig, a former UTSA student, and his coworkers put artificial snakes, some looking like coral snakes and others with a uniformly brown coloration, on the ground at 14 field sites. Seven of the sites were frequented by coral snakes (“Coral Snakes...
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