Exam 40: Population Ecology and the Distribution of Organisms

A population is correctly defined as having which of the following characteristics? I. inhabiting the same general area II) belonging to the same species III) possessing a constant and uniform density and dispersion

Which pattern of reproduction is correctly paired with a species?

Which marine zone has the lowest rates of primary productivity (photosynthesis)?

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

Why do some invertebrates, such as lobsters, show a "stair-step" survivorship curve?

Which of the following is most likely to contribute to density-dependent regulation of populations?

Use the survivorship curves in Figure 40.3 to answer the following questions. Figure 40.3 -Which curve best describes survivorship in marine molluscs?

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

Which statement describes how climate might change if Earth was 75% land and 25% water?

Pacific salmon and annual plants are excellent examples of

In models of logistic population growth,

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?

Which of the following graphs illustrates the growth curve of a small population of rodents that has grown to reach a static carrying capacity?

A population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02. Calculate an estimate of the number of individuals added to (or lost from) a population of 1,000 individuals in one year.

Imagine that you are managing a large game ranch. You know from historical accounts that a species of deer 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 likely appear as

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 of the following best substantiates why location 3 is an equatorial (tropical) climate?

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 of the following causes populations to shift most quickly from an exponential to a logistic population growth?

Why do populations grow more slowly as they approach their carrying capacity?

According to the logistic growth equation = r max N