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Exam 53: Populations and Life History Traits

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Question 21

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Use the graph to answer the following question. Which hypothesis is most consistent with these data on hare and lynx populations in the graph?

A) Hares decrease in number just before lynx population size begins to increase.
B) Lynx likely control hare population density.
C) Lynx and hare populations are independent of each other.
D) The relationship between the populations cannot be determined only from this graph.

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Question 22

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Often the growth cycle of one population has an effect on the cycle of another. As moose populations increase, for example, wolf populations also increase. Thus, if we are considering the logistic equation for the wolf population, = rN Which of the factors accounts for the effect of the moose population?

A) r
B) N
C) rN
D) K

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Question 23

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In 2019, the population of New Zealand was approximately 4,794,000 people. If the birth rate was approximately 13 births per 1,000 people, approximately how many births occurred in 2019?

Use the hypothetical or idealized survivorship curves in the figure to answer the following question. Which of the following curves best describes survivorship in a typical elephant population?

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

In 2019, the United States Census Bureau reported the various components of population change as estimated below. ∙ One birth every 8 seconds ∙ One death every 11 seconds ∙ One international migrant (net of immigrants versus emigrants) every 33 seconds ∙ Net gain of one person every 17 seconds During that year, which component was four times slower than the birth rate?

A population's carrying capacity ________.

According to the logistic growth equation below, ________. = rN

Which of the following techniques would provide the most accurate data on population density?

Which of the following statements about human populations in industrialized countries is correct?

Ecologists define carrying capacity (K) as the maximum population size that a particular environment can sustain. Which statement about K is correct?

The observation that members of a population are uniformly distributed suggests that ________.

Analyzing ecological footprints reveals that ________.

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square kilometer (km2) in one woodlot and 20/km2 in another woodlot. These data could be best used to answer which of the following questions?

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Population ecologists follow the fate of same-age cohorts to ________.

Use the figure to answer the following question. Based on the figure and given the populations of the following countries, which country uses the most oil overall?

In the process of researching how to manage a large game ranch, historical accounts indicated that a species of deer that once lived there had been extirpated. After doing some research to determine what might be an appropriately sized founding population, managers reintroduced deer to the ranch. The population then increased for several generations, and the managers graphed the number of individuals (vertical axis) against time, or the number of generations (horizontal axis) . If no natural predators are impacting the population, which of the following graphs best represents the population?

Use the table to answer the following question. In the accompanying life table of a hypothetical population, what are the missing values for lx (y and z) ? lx = the proportion alive at the start of year (age specific survivorship rate) .

Which of the following traits is characteristic of K-selected populations?