Practice_Exam_4_F10 - Biology 100 Fall 2010 PRACTICE EXAM 4...

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Biology 100 McClenaghan Fall 2010 Section 5 PRACTICE EXAM 4 1. In logistic population growth, a population grows up to a maximum size at which the birth rate equals the death rate. This maximum size is called the _____________________ of the environment. a. numerical response b. dispersion c. carrying capacity d. climax e. none of the above 2. A wheat field in western Kansas is plowed under and left alone for 100 years. Over time, the field eventually becomes grassland, the climax community for that locality. This scenario describes ____. a. primary succession b. eutrophication c. secondary succession d. desertification e. subsidence 3. A single pine tree produces thousands of seeds each year. Few of these seeds survive and germinate, and many of those that do survive are eaten by animals. However, once a tree reaches a particular size, it lives for a long time before dying of old age. What type of survivorship curve do you expect this pine tree species to display? a. Type I b. Type II c. Type III d. logistic e. exponential 4. Species A concentrates nasty tasting, chemical compounds in its tissues as a mechanism for deterring predators. Species B has evolved a morphology and bright coloration that are very similar to Species A, but B does not contain the foul-tasting compounds in its tissues. An astute ecologist might hypothesize that Species B is a (an) ________________. a. Batesian mimic b. object mimic c. aposematic mimic d. Batesian model e. cryptic mimic 5. Bacteria and fungi are important to ecosystem function because of their role as ________________. a. decomposers b. primary producers c. primary consumers d. competitors e. pathogens 6. Picture yourself as a single-celled, photosynthetic phytoplankton living in a freshwater lake. Which of the following would represent an abiotic factor in your environment? a. a nearby “planktivorous” fish. b. the pH of the water in which you live. c. members of other phytoplankton species that compete with you for sunlight and nutrients. d. the amount of CO 2 dissolved in the water around you. e. both b and d 7. The _______ is the set of conditions, resources and interactions that are necessary for members of a species to survive and successfully reproduce at a location. a. the environment b. community c. ecosystem d. niche e. biosphere 8. The three major trophic categories of every ecosystem are: a. producers, herbivores, carnivores b. producers, consumers, decomposers c. plants, animals, climate d. energy, water, mineral nutrients e. water, carbon, nitrogen 9. At the present time, the world’s human population is displaying _____________ growth. a.
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This note was uploaded on 12/16/2010 for the course BIO 100 taught by Professor Mclenehan during the Fall '08 term at San Diego State.

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Practice_Exam_4_F10 - Biology 100 Fall 2010 PRACTICE EXAM 4...

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