Exam 40: Population Ecology and the Distribution of Organisms

Imagine that a deep temperate zone lake did not "turn over" during the spring and fall seasons. Based on the physical and biological properties of limnetic ecosystems, what would be the difference from normal seasonal turnover?

If the direction of Earth's rotation reversed, the most predictable effect would be

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

Which of the following environmental features might influence microclimates?

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 2?

In the ecological development of terrestrial biomes, which factor is most dependent on all the others?

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square mile in one woodlot and 20 per square mile in another woodlot. What was the ecologist comparing?

Use the survivorship curves in Figure 40.3 to answer the following questions. Figure 40.3 -Which curve best describes survivorship in humans who live in developed nations?

Which of the following choices would most likely promote random distribution?

Which of the following pairs of reproductive strategies is consistent with energetic trade-off and reproductive success?

Starting from a single individual, what is the size of a population of bacteria that reproduce by binary fission every 20 minutes at the end of a 2-hour time period? (Assume unlimited resources and no mortality.)

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 of the factors accounts for the effect of the moose population?

Why is the climate drier on the leeward side of mountain ranges that are subjected to prevailing winds?

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 biomes is correctly paired with the description of its climate?

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

In mountainous areas of western North America, north-facing slopes would be expected to

Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be

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

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