BIS2C midterms spring 2010

BIS2C midterms spring 2010 - Exam mean = 82%; Scores range...

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Name: __ Annotated Answer Key ____ Last, First Biological Sciences 2C (Dehesh & Keen) Spring 2010 Midterm #1 Please Read the Instructions First . Check your pages--there are 11 pages in this exam (including this page). You are responsible for making sure that you have all the pages. This examination is worth 100 points. Please bubble in the 9 digits of your student ID number on your scantron. Mark Test Form A. True/False questions—10 questions at 2 points each: 20 points total Multiple Choice Questions—20 questions worth 3 pts each: 60 points total 1. Indicate your answers on the scantron sheet using a number 2 or a test scoring pencil. Press heavily, do not stray out of the margins, and completely erase any changed answers. 2. Circle your answers on the page. 3. If you think that a multiple choice question is ambiguous or confusing, use the “explanation sheet” at the end of the examination to explain the problem. Put your name on this sheet—we tear them off to read them! Fill-in Questions--4 questions, some with multiple parts, worth 20 points total 1. Use pen only (no grade corrections for pencil). 2. Write only one answer per question--you can elaborate on an answer, but you will not be given any credit if you write two different answers to the question . 3. Be specific and focused; do not expect the graders to read between the lines. 4. Spelling rules: No points will be given if the misspelling alters the meaning of the word. There are also 2 bonus multiple-choice questions (page 10) worth 6 points total You have 50 minutes, so budget your time –leave enough time to complete the last fill-in section, as it is worth 20% of the exam. Page 8: _____________/5 Page 9 ______________/10 Page 10 ______________/5 Exam mean = 82%; Scores range from 45 to 106 (with bonus); < 70% = a D on this test
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Midterm 1 BIS 2C Spring 2009 2 True / false questions (2 Points each; total = 20 Points) Fill in the answer on the SCANTRON using a #2 pencil. Indicate whether the sentence or statement is true or false: A for true and B for false . 1. Convergent evolution typically results in homology. False—that is homoplasy 2. Because cyanobacteria do not contain organelles, they cannot photosynthesize or carry out cellular respiration. False; they do both 3. For any four taxa, more rooted trees can be made than unrooted trees. True, see the lecture slide. 4. The Gram method is useful for classifying all bacteria that have two plasma membranes. False—nothing has 2 plasma membranes, and the Gram stain is retained by a thick peptidoglycan layer in Gram positive forms. 5. Branch lengths in a phylogram represent the number of evolutionary changes occurring in each lineage. True 6. The type of mutation that stops translation of a protein is a missense mutation. False 7. Chlamydia use axial filaments to move and include the bacterium that causes syphilis. False; syphilis is a Spirochete. 8.
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BIS2C midterms spring 2010 - Exam mean = 82%; Scores range...

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