Exam 40: Population Ecology and the Distribution of Organisms

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 produces the most global oxygen?

The tilt of the Earth's axis relative to its plane of orbit is 23.5 degrees.Which of the following events might you predict to occur if the angle of tilt increased to 33 1/2 degrees?

What is the limiting factor for the growth of trees in the tundra?

Carrying capacity is

Which of the following is the best natural example of uniform distribution?

Which of the following graphs illustrates the population growth curve of single bacterium growing in a flask of ideal medium at optimum temperature over a 24-hour period?

Which of the following would most likely promote random distribution?

In which of the following situations would you expect to find the largest number of K-selected individuals?

Figure 40.3 -Which curve best describes survivorship in a marine crustacean that molts (i.e. ,sheds its exoskeleton in order to grow)?

As N approaches K for a certain population,which of the following is predicted by the logistic equation?

Exponential growth of a population is represented by dN/dt = rN.What does "r" represent in the equation?

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. )

Which of the following examples of an ecological effect leading to an evolutionary effect is most correct?

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

Studying species transplants is a way that ecologists

What is one application of the metapopulation concept?

Long-term studies of Belding's ground squirrels show that immigrants move nearly 2 km from where they are born and become 1-8% of the males and 0.7-6% of the females in other populations.On an evolutionary scale,why is this significant?

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

Deserts typically occur in a band around 30 degrees north and 30 degrees south latitude because

Which of the following could be a density-independent factor limiting human population growth?