Test #3 - Pre-quizzes.docx - 1 Chapter 11 1 What is the...

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1 Chapter 11 1. What is the difference between population distribution and population dispersion? a. Population dispersion is how a population increases or decreases its range. b. Population dispersion is the spacing of individuals with respect to one another within a population. c. Population distribution does not consider the density of a population within its range. d. Population distribution refers to the area an entire species occupies, while dispersion is only one subpopulation. 2. A realized niche is 3. The American bullfrog is native to eastern North America, but it has been moved by humans and thrives in western North America. What does this suggest about the cause of the bullfrog’s historical range limit? 4. The spread of introduced species can be predicted using 5. What mechanisms could cause evenly spaced distributions of individuals within populations? a. territorial animals b. vegetative reproduction c. the formation of flocks or herds d. variable levels of predation 6. Suppose that 100 cattle were allowed to graze in either one of two pastures. If the grass was three times as productive in pasture A as in pasture B, how many cows would you expect in pasture A according to the ideal free distribution? 7. Which model includes consideration of the quality of the surrounding matrix?
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2 8. Plant A has seeds that are carried by the wind and plant B has seeds that are distributed by gravity. How would lifetime dispersal distance and neighborhood size differ for plants A and B?
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