2011+Midterm+1+answer+key

2011+Midterm+1+answer+key - Name (Signature)_Student ID #_...

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Name (Signature)___________________________________Student ID #__________ BIS2B Midterm 1. Rosenheim ANSWER KEY Winter 2011 DO NOT OPEN THIS PACKET UNTIL INSTRUCTED TO DO SO IMPORTANT INSTRUCTIONS -- READ FIRST 1. Put your name and student ID number on every page. 2. Make sure you have every page of this exam. There are 7 pages and 12 questions. Total: 100 points. 3. On the examination, write all answers in pen . 4. We cannot accept re-grade requests for exams written in pencil or that have whiteout. 5. On the SCANTRON forms use a #2 pencil. 6. Be sure to put your name, student ID on the SCANTRON . 7. Also on the SCANTRON, bubble in Test Form “ A”. 8. Simple (non-graphing) calculators are allowed. p 6 p 7 p 8 1
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Name (Signature)___________________________________Student ID #__________ Questions 1-8: Multiple choice questions (5 points each; total 40 points) Select one best answer and mark SCANTRON form using a #2 pencil. Be sure to put your name and student ID on the SCANTRON (and circle the answer on the exam). 1. Which of the following is a way in which bacterial genes, including genes that may confer resistance to antibiotics, can be moved from one bacterium to another: a. by bacterial conjugation, in which part of the bacterial chromosome is passed from one bacterial cell to another b. by bacterial conjugation, in which plasmids may move between bacteria c. by transduction, in which bacterial genes are moved between bacterial cells by a virus d. by transformation, in which naked DNA is taken up from the environment and incorporated into the bacterial chromosome e. all of the above are true Answer: e 2. Which of the following is NOT a condition that is necessary and sufficient for evolution by natural selection to occur within a population a. variation in the phenotype due to exposure to a particular environmental condition (“phenotypic plasticity”) b. inheritance of traits that vary within a population c. differential mean expectation of reproductive success for different members of the population d. variation in some traits that the population members express (i.e., variation in the “phenotype”) e. all of the above are true Answer: a 3. Bacteriophages a. are single-celled eukaryotes that consume bacteria b. may provide an ecosystem disservice by transferring genes that confer resistance to antibiotics between different populations of pathogenic bacteria c. may provide an ecosystem service by suppressing pathogenic bacteria that are difficult to control with antibiotics because they are resistant or form biofilms d. both b and c are true e. a , b , and c are true Answer: d 4. Pollination services: a. may be provided by a diverse assemblage of animals, including bees, moths, flies, birds, and bats b. may be lost in areas with intensive agricultural production, because these areas lack the food and nesting requirements of key pollinator populations c. may be stronger where agricultural fields are adjacent to natural plant communities, but are lost at
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2011+Midterm+1+answer+key - Name (Signature)_Student ID #_...

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