Midterm 2.F09.VerA.Key

Midterm 2.F09.VerA.Key - Biology 5C Midterm 2. 9 November...

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Biology 5C Midterm 2. 9 November 2009 TA Name Lab Day & Time 1. Female alkali bees, Nomia melanderi, dig their nests in patches of sandy alkali soil. They are unable or unwilling to nest in other soil types. What dispersion would you expect to observe for the alkali bee? a. Clumped b. Uniform c. Random d. Stochastic e. None of the above 2. Large numbers of dinosaur fossils have been unearthed on the northern tip of the Antarctic peninsula. You may conclude that: a. Past environmental conditions could support dinosaur populations. b. Past environmental conditions could support dinosaur individuals but not populations. c. Past environmental conditions could support dinosaur critical functions but not populations. d. Environmental conditions in Antarctica have changed after millions of years. e. Both a and d. 3. Rory was conducting a mark/recapture study of subterranean snails in Lechuguilla Cave in New Mexico, but when he reached into the last trap on the last day of his study, he heard a deep rumble and rocks started to fall from the cave roof. Startled, Rory dropped his notes and they were buried under the rubble. He tried to find reconstruct his notes, but ended up missing an important piece of information. Rory knew that the population of snails in the cave was 7000. He had caught 100 snails in his traps and 20 of those had paint on their shells to mark them. How many marked snails did Rory release at the start of his study? a. 175 b. 350 c. 700 d. 1400 e. 2800 4. The carrying capacity of Lake Irvine in Orange County for Channel Catfish is 100,000, but to please fishermen, the County has added catfish to the lake so that the population of fish this year is 300,000. The impact of the availability of food on growth of this fish population would be: a. Interactive with metabolic costs of lake phytoplankton. b. Weaker than it would be if the population was 100,000. c. The same as it would be if the population was 100,000. d. Stronger than it would be if the population was 100,000. e. None of the above.
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Biology 5C Midterm 2. 9 November 2009 TA Name Lab Day & Time X alive at x l x die in x b x (Month) 0 100 20 0 2 30 3 4 50 4 6 40 10 5 8 30 10 2 10 20 1 12 0 0 0 5. Using the life table above, what is the mean generation time in months a . 3.88 b. 3.91 c. 4.39 d. 4.45 e. 5.12 6. Using the life table above, what is the approximate population at the end of 3 generations a. 52,500 b. 37,325 c. 32,470 d. 22,550 e. 12,965 7. If a population of 220 Oryx has an annual reproductive rate of 4.0 and a mean generation
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Midterm 2.F09.VerA.Key - Biology 5C Midterm 2. 9 November...

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