After seeds have sprouted, gardeners often pull up some of the seedlings so that only a few grow to maturity. How does this practice help produce the best yield?
a. By increasing K
b. By decreasing r
c. By reducing intraspecific competition
d. By adding a density-independent factor to the environment

Use this graph of the idealized exponential and logistic growth curves to complete the following.

a. Label the axes and curves on the graph.

b. Give the formula that describes the blue curve.

c. What does the dotted line represent?

d. For each curve, indicate and explain where population growth is the most rapid.

e. Which of these curves best represents global human population growth?

The graph below shows the demographic transition for a hypothetical country. Many developed countries that have achieved a stable population size have undergone a transition similar to this. Answer the following questions concerning this graph.

a. What does the blue line represent? The red line?

b. This diagram has been divided into four sections.

Describe what is happening in each section.

c. In which section(s) is the population size stable?

d. In which section is the population growth rate the highest?

To figure out the human population density of your community, you would need to know the number of people living there and

a. The land area in which they live

b. The birth rate of the population

c. The dispersion pattern of the population

d. The carrying capacity

The term (K−N)/K

a. Is the carrying capacity for a population.

b. Is greatest when K is very large.

c. Is zero when population size equals carrying capacity.

d. Increases in value as N approaches K.

With regard to its rate of growth, a population that is growing logistically

a. Grows fastest when density is lowest

b. Has a high intrinsic rate of increase

c. Grows fastest at an intermediate population density

d. Grows fastest as it approaches carrying capacity