Exam 40: Population Ecology and the Distribution of Organisms

In July 2008,the U.S.population was approximately 302,000,000.If the estimated 2008 growth rate was 0.88%,approximately how many total Americans were there in July 2009?

Using the logistic growth model,population growth would be represented by dN/dt =

A particular mountain range is subjected to prevailing winds.Which of the following contributes the most to a drier climate on the leeward side of the mountain range?

Which of the following groups would be most likely to exhibit uniform dispersion?

Fire suppression by humans

A population of snowshoe hares was introduced to an appropriate habitat also inhabited by their natural predators in northern Canada.Which of the following graphs illustrates the growth over several seasons of the snowshoe hares?

Which of the following choices causes all of the others in creating global terrestrial climates?

Figure 40.2 shows a generalized cross section of the marine environment with various zones labeled with letters.Choose the number that best answers the question(s). Figure 40.2 -Which zone has a condition of constant temperature?

Coral reefs can be found on the southeast coast of the United States but not at similar latitudes on the southwest coast.Differences in which of the following most likely account for this?

Which of the following levels of ecological organization is arranged in the correct sequence from most to least inclusive?

A population's carrying capacity

Figure 40.3 -Which statement best explains survivorship curve B?

Which marine zone is expected to have the lowest rates of primary productivity (photosynthesis)?

If a meteor impact or volcanic eruption injected a lot of dust into the atmosphere and reduced the sunlight reaching Earth's surface by 70% for one year,which of the following marine communities most likely would be least affected?

Which variables define the ecological life history of a species?

Which of the following statements best describes the effect of climate on biome distribution?

The main reason that polar regions are cooler than the equator is that

Please use the following information to answer the question(s)below. The eight climographs in Figure 40.1 show yearly temperature (line graph and left vertical axis)and precipitation (bar graph and right vertical axis)averages for each month for some locations on Earth.Choose the climograph that best answers the question. Figure 40.1 -Which climograph shows the climate for location 3?

A certain species of pine tree survives only in scattered locations at elevations above 2,800 m in the western United States.To understand why this tree grows only in these specific places,an ecologist should

What is population dispersion?