Practice+Exam+2 - Biology 171 Student Name Signature Second...

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Biology 171 Student Name ______________________________ Signature _________________________________ Second Exam Student ID ________________________________ GSI/Section _______________________________ PLEASE READ THESE IMPORTANT INSTRUCTIONS: Practice Exam 2 1. Please provide the information requested at the top of this page, then initial the remaining pages of the exam . As you do so, please verify that your booklet has 18 total pages. 2. On the left side of the Scantron answer sheet, bubble in your NAME, three-digit LAB SECTION NUMBER, and eight digit STUDENT ID NUMBER. Enter the number shown above in the FORM column. On the right side of the Scantron, write your signature, the course number, and the date. Under the heading "Other", enter your GSI's NAME. 3. Answer all 30 multiple-choice questions in SECTION A. In each case, choose the one best, most complete answer. The multiple-choice questions are worth 2 points each. Use a No. 2 pencil to mark your answers on the Scantron answer sheet. Do not make marks on the answer sheet outside of the designated areas. Do not fold the answer sheet. 4. Answer 4 of the 5 short answer questions in SECTION B and cross out the surplus question . These are worth 10 points each. If all 5 short answer questions are answered, the first 4 ONLY will be assessed. The exam has 100 total points. 5. Only multiple choice answers entered on the ANSWER SHEET will be graded. Questions with more than one answer marked will be scored as incorrect. There is no penalty for guessing. In the rare instances where you feel a question is ambiguous, you may write an explanatory sentence in the margin of the exam (not on the answer sheet) next to the question to justify the answer you select. You may change an answer on the answer sheet by completely erasing the incorrect answer. Do not cross out an incorrect answer; the scoring machine will count it as marked. 6. At the end of the exam, turn in BOTH the ANSWER SHEET and ALL PAGES OF THE EXAM BOOKLET to YOUR GSI. 7. Good Luck!
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SECTION A: MULTIPLE CHOICE QUESTIONS (answer all 30) 1. Arthropods such as caterpillars exhibit higher secondary production efficiencies than mammals such as chipmunks because: a) arthropods expend less energy maintaining their body temperature b) arthropods are always part of decomposer food webs c) mammals such as chipmunks occupy higher trophic levels than arthropods d) mammals give birth to live young e) a and b 2. Communities in which the biomass of primary producers is less than the biomass of primary consumers: a) do not exist b) are commonly found in marine ecosystems c) exhibit a high turnover rate of primary producers d) typically have more than eight trophic levels e) b and c 3. When Robert Paine removed the sea star, Pisaster ochraceus , from experimental areas of coastal intertidal communities: a) the mussel, Mytilus californianus , became extinct b) the keystone species was unaffected c) sea urchins overgrazed kelp d) species diversity decreased
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Practice+Exam+2 - Biology 171 Student Name Signature Second...

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