Prairie dogs once covered the expanses of the Great Plains. Their grazing made the grass more nutritious for the huge herds of bison, and a variety of snakes, raptors, and mammals   preyed on the rodents. In fact, the black- footed ferret (now endangered) specialized in prairie dog predation. Today, growing housing and agricultural developments have covered many prairie dog towns. Which of the following statements about prairie dogs is true?

TLS Online TPP Program

#Question id: 12614

#Unit 10. Ecological Principles

A small population of white-footed mice has the same intrinsic rate of increase (r) as a large population. If everything else is equal,

TLS Online TPP Program

#Question id: 12615

#Unit 10. Ecological Principles

Imagine that you are managing a large ranch. You know from historical accounts that wild sheep used to live there, but they have been extirpated. You decide to reintroduce them. After doing some research to determine what might be an appropriately sized founding population, you do so. You then watch the population increase for several gen- erations, and graph the number of individuals (vertical axis) against the number of generations (horizontal axis). The graph will appear as

TLS Online TPP Program

#Question id: 12616

#Unit 10. Ecological Principles

In the logistic equation

  

is a measure of the population's intrinsic rate of   increase. It is determined by which of the following?

TLS Online TPP Program

#Question id: 12617

#Unit 10. Ecological Principles

In 2005, a country had a population of approximately 295,000,000 people. If the birth rate was 13 births for every 1,000 people, approximately how many births occurred in the United States in 2005? 

TLS Online TPP Program

#Question id: 12618

#Unit 10. Ecological Principles

Exponential growth of a population is represented by dN/dt

TLS Online TPP Program

#Question id: 12619

#Unit 10. Ecological Principles

Logistic growth of a population is represented by dN/dt