KimseyRoseheimFinalW03key - Name_Student ID #_ BIS 1B,...

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Name_____________________________________________Student ID #________________________ 1 BIS 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 best answer 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 NOT often 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: a. refers to a process in which beneficial mutations accumulate over time in asexual lineages, leading to "accumulation of design". b. can lead to a long-term cost of asexual reproduction. c. is also called “the two-fold cost of sex". d. may explain why clades containing a large number of exclusively asexually-reproducing species are common. e. relies on the shuffling of genes within sexually reproducing lineages to operate. Ans: b 4. The exocuticle and the endocuticle layers of the insect exoskeleton a. are both made up of chitin and protein. b. are both flexible, allowing insects to flex their exoskeletons c. are both digested at the time of molting, allowing the insect to recycle the compounds into the newly synthesized exoskeleton. d. allow the insect to expand its external dimensions continuously as it grows, except for immediately after a molt when the insect’s size is constant. e. function primarily as a means of waterproofing the outside of the animal’s body. Ans: a 5. Genetic drift a. is an evolutionary process in which gene frequencies change due to chance events in finite populations. b. produces larger changes in gene frequencies when the population size is smaller. c. tends to remove genetic variation from populations. d. may be particularly relevant to geneticists who are studying endangered species of animals. Deleted: a Deleted: a
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Name_____________________________________________Student ID #________________________ 2 e. all of the above are true. Ans: e 6. The aquiferous system of sponges is comparable to the water vascular system of echinoderms in that they a. contain water and various systems of moving water about b. are used to move water through a filter or suspension feeding system c. are used in several different ways for locomotion of the organism across hard surfaces
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This note was uploaded on 04/15/2008 for the course BIS 1b taught by Professor Kimsey during the Spring '08 term at UC Davis.

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KimseyRoseheimFinalW03key - Name_Student ID #_ BIS 1B,...

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