Name_____________________________________________Student ID #________________________ 1BIS 1B, Section Final Exam. Kimsey and Rosenheim ANSWER KEY Winter 2003 Questions 1-20: Multiple choice questions (3 points each; total 60 points) Select one bestanswer and mark SCANTRON form using a #2 pencil. Be sure to put your name and student ID on the SCANTRON(and circle answer on the exam). 1. Which of the following is NOToften a feature of the life cycles of parasitic flatworms in the Class Trematoda: a. sexual reproduction. b. asexual reproduction. c. the production of a large number of tiny, yolk-poor eggs. d. the production of a small number of large, yolk-rich eggs. e. a single definitive host and one or more intermediate hosts. Ans: d 2. Free-spawning and external fertilization: a. are found commonly in the oligochaete annelids (earthworms). b. are efficient methods of asexual reproduction when environmental conditions are harsh. c. are generally ineffective methods of sexual reproduction in terrestrial environments. d. necessitate physical contact between the mating individuals. e. cannot occur successfully in marine environments. Ans: c 3. Muller's ratchet: 4. The exocuticle and the endocuticle layers of the insect exoskeleton 5. Genetic drift Deleted: aDeleted: a
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