Biology Final   A small population of white-footed mice has the same intrinsic rate of increase (r) as a large population

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

the large population will add more individuals per unit time

2. 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 generations, and graph the number of individuals (vertical axis) against the number of generations (horizontal axis). The graph will appear as

a "J" increasing with each generation

3. In the logistic equation dN/dt=rN, (K-N)/K, r is a meaure of the population's intrinsic rate of increase. It is determined by which of the following?

birth rate and death rates

4. In 2005, the US 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 US in 2005?

3,800,000

5. Exponential growth of a population is represented by dN/dt=

rN

6. Often the growth cycle of one population has an effect on the cycle of another. As moose populations increase, wolf populations also increase. Thus, if we are considering the logisitic equation for the wolf population, dN/dt=rN (K-N)/K, which of the factors accounts for the effect on the moose population?

K

7. Which of the following might be expected in the logisitic model of population growth?

as N approaches K, d increases

8. In models of sigmoidal (logistic) population growth,

population growth rate slows dramatically as N approaches K

9. The Allee effect is used to describe a population that

has become so small that it will have difficulty surviving and reproducing

10. Which of the following is the pattern of spacing for individuals within the boundaries of the population?

dispersion