BIOL100 s07 test

BIOL100 s07 test - Biology 100 Spring 2007 PRACTICE EXAM IV...

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Biology 100 McClenaghan Spring 2007 PRACTICE EXAM IV KEY Correct answers are in BOLD below. 1. Desert shrubs compete with one another for water. Therefore, we might expect desert shrubs to display a _____________________ pattern of dispersion. a. uniform b. clumped c. Type II d. exponential e. random 2. In Africa, a species of bird called the “ox-pecker” spends much of their time riding around on the backs of large grazing animals such as the rhinoceros. The ox-pecker obtains food by eating ticks and other parasites that infect the rhino’s skin. Thus, the bird gets a meal and the rhino has its parasite load reduced. This might be used in lecture as an example of a ___________________ relationship. a. commensal b. neutralistic c. competitive d. mutualistic e. platonic 3. In terms of primary productivity, which of the following is roughly equivalent to the open ocean? a. grassland b. tropical forest c. desert d. coral reef e. freshwater lake 4. A wheat field in western Kansas is plowed under and left alone for 100 years. Over time, the field eventually becomes grassland, the predominant biome for that locality. This scenario describes ____. a. primary succession b. eutrophication c. secondary succession d. desertification e. subsidence 5. Environmental scientists now have an in-depth understanding of global warming and it’s effects on the biosphere. As a result, they can accurately predict future effects of this phenomenon. TRUE or FALSE ? a. True b. False 6. Most of the extinctions of species that are predicted to occur in the near future will be the result of the ____. a. dredging of wetlands b. logging of old growth coniferous forests c. destruction of coral reefs d. deforestation of tropical forests e. damming of the world’s rivers 7. 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 8. Two species that live together without harming one another are called ____________. a. symbionts b. competitors c. keystone species d. climax species e. both a and b 9. Limestone, coal deposits and coral reefs contain large quantities of the nutrient called carbon. These represent carbon in the _____________ form. a. exchange pool b. reservoir c. biomass d. climax e. detrital 10. Probably the single most important factor that plants and animals living in estuaries have to deal with is __. a. pH b. variable salinity c. wave action d. extreme temperatures e. low nutrient levels 11. Of the 10 hottest years recorded in the last century, 8 occurred between 1980 and 1999. This would appear to support the hypothesis that the earth is getting warmer because of increased concentrations of _________ in the atmosphere. a.
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BIOL100 s07 test - Biology 100 Spring 2007 PRACTICE EXAM IV...

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