Exam 40: Population Ecology and the Distribution of Organisms

With respect to the sun,Earth normally rotates once in a 24-hour period.What would be the effect on climate in the temperate latitudes if the rotation increased to 48-hours?

Which of the following best defines a cohort?

What is a metapopulation?

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

According to the logistic growth equation [&*frac*{dN}{dt}|=|rN|thn|*frac*{(K|-|N)}{K}&]

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

Which of the following sets of measurements would best describe a population's physical structure and vital statistics?

Please use the following information to answer the question(s)below. In areas of permafrost,stands of black spruce are frequently observed in the landscape,whereas other tree species are noticeably absent.Often these stands are referred to as "drunken forests" because many of the black spruce are displaced from their normal vertical alignment. -What might be the adaptive significance of these unusual forests growing the way they do in this marginal habitat?

Consider two forests: one is an undisturbed old-growth forest,and the other has recently been logged.In which forest are species likely to experience exponential growth,and why?

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

Which of the following is an intrinsic physiological factor that can regulate population size?

In mountainous areas of western North America,which type of plant life would you expect to find on a southern-slope of a mountain?

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 5?

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 the lowest biomass per unit of volume?

To construct a life table for a sexual species,you need to

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

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,dN/dt = rN ,which factor accounts for the effect of the moose population?

Which of the following methods would most accurately measure the density of the population being studied?

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

Generalized global air circulation and precipitation patterns are dependent on the intensity of solar radiation near the equator.Which of the following correctly states an event that contributes to the creation of these global patterns?