Cat lineage Treehopper-ant interaction Temperature, o C Biology 1911 Exam February 26 th , 2010 Exam test code 11 Exam Sequence Number: Exam Test Code and Exam Sequence Number must be recorded on scantron Have your Temple ID available for inspection on the desktop Show it to proctors when you turn in exam PRINT your name (neatly) as it appears on your TU ID ______________________________________ Your Temple ID # _____________________________ Lab instructor’s name & lab section no. ____________________________ Your signature ____________________________________ Instructions for completing scantron information are on overhead During the exam: Record multiple choice answers on exam as well as scantron. You may not leave early unless you are in an aisle seat. You may not leave within 5 minutes of the end of the exam. When time is called : Bring exam, scantron and TU ID to the proctor collecting exams with your color. Place your exam and scantron in separate boxes marked for each. Show your ID to instructor at exit. NO QUESTIONS WILL BE ANSWERED DURING EXAM Page | 1
Each question is worth 2 points. All answers must be on the scantron. 1. The "heat" in chili peppers is due to a molecule called capsaicin. Suppose you breed chili peppers that have low amounts of capsaicin over many generations in order to make them milder (have less capsaicin). What process is occurring? a) Inherited variation b) Artificial selection c) Natural selection d) Environmental change e) none of the above 2. What are the requirements for evolution by natural selection in a given population? a) (1) The population varies; (2) all variations are heritable; (3) some individuals produce more offspring than others b) (1) Individuals in a population vary; (2) the variation is neutral; (3) offspring are produced that can survive; (4) certain traits lead to greater reproductive success than other traits. c) (1) Individuals in a population vary; (2) the variation is heritable; (3) all individuals have different alleles. d) (1) Individuals in a population vary; (2) the variation is heritable; (3) some individuals produce more offspring than others; (4) certain traits lead to greater reproductive success than other traits. 3. Which of the graphs below best represents the relationship between the intensity of directional selection and the genetic variation present within a population? 4. The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from all other populations including their original homeland. Which of the following likely explains the genetic uniqueness of this population? a)
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