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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 ____. 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? 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) ________________. 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? 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.
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