Exam1%20Practice%20Problems

Exam1%20Practice%20Problems - Biology 171 Winter 2009...

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1 Biology 171 Winter 2009 Drs. Kurdziel & Hunter Answer Key will be posted Friday prior to the first exam. Exams for BIO 171 will be written jointly by Dr. Kurdziel & Dr. Hunter. We have not taught the class together in previous semesters, so we don’t have an old practice exam for you. Rather, we have put together examples of the types of Qs that we will write. Exam Format: 30 Multiple-Choice Qs worth 2 points each and 4 Short Answer Qs worth 10 points each, for a total of 100 points. You will have a choice of SA Qs – you must answer 4 out of 5 given; you cannot answer all 5. Sample Practice Problems: Multiple-Choice (MC) Questions: For these Qs, choose the one , best answer from the five choices (A through E) given. 1. You collect data on births and deaths for three populations of crickets and calculate per capita birth and death rates. All populations have the same carrying capacity of 1000. per capita birth rate per capita death rate Population 1 0.90 0.80 Population 2 0.45 0.35 Population 3 0.15 0.05 Which of the following statements are TRUE? A. Population 1 is growing at the fastest rate. B. Population 3 is growing at the slowest rate. C. If all three populations start with 50 individuals, they will all increase by the same number of individuals one year later. D. All of the above. E. None of the above. 2. In the far North, arctic foxes typically follow polar bears and the foxes feed on the animal carcasses left behind by the polar bears. If we are considering the interaction between polar bears and foxes, this is an example of which type of species interaction? A. mutualism B. commensalism C. parasitism D. predation E. amensalism 3. All of the following are accurate statements about mutualisms between land plants and bacteria or fungi EXCEPT A. about 90% of land plants form mutualistic associations with mycorrhizal fungi B. mycorrhizal fungi increase the absorptive surface area of a plant’s roots and thereby allow the plants to take up water and essential nutrients more efficiently C. Rhizobium bacteria are located on the roots of plants in structures called nodules D. both the mycorrhizal fungi and the mutualistic bacteria benefit by obtaining sugars from the plants E. mycorrhizal fungi convert nitrogen into ammonium that plants need for growth
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2 4. Lepomis sp. A (a species of fish) is found in the surface waters of the lake and Lepomis sp. B is found in the vegetated area near the lake shore. Which would be the best way to directly test the hypothesis that Lepomis sp. A is competitively excluded from the vegetated, near- shore habitat by Lepomis sp. B ? A. Place both species in an aquarium in the lab and see which species survives. B. Remove all Lepomis sp. B from the vegetated, near-shore habitat. C. Transplant
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Exam1%20Practice%20Problems - Biology 171 Winter 2009...

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