You are an ecologist researching divergent evolution on the Galapagos Islands. Which of the following might you be studying?
A) the processes by which the various species of finches on the islands diverged from a common ancestor
B) the processes by which several unrelated species of birds developed flightlessness as a result of the islands' lacking natural predators
C) the geological processes by which the islands were formed millions of years ago
D) the similarities that have arisen between two completely unrelated species of birds that are competing for the same resources
E) the spread of an invasive bird species that has been introduced to some of the islands
Answer: D
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"The Tragedy of the Commons" is based on the view that
A. Only privatization or strict laws can overcome people's selfish and greedy nature. B. Open access systems can be sustained and promoted. C. Communal systems can be sustained and promoted. D. Individuals will try to maximize gain for the group at a loss for the individual. E. Community members will attempt, without success, to sustain a resource for future generations.
What social challenges are posed by a pyramid-shaped versus a "top-heavy" age structure diagram?
What will be an ideal response?
If the market prices of fossil fuels increased to reflect their true cost, we would see less emphasis on energy conservation and energy efficiency.?
Answer the following statement true (T) or false (F)
Which of the following statements regarding water density is correct?
A) Adding dissolved substances increases the temperature of maximum density for water because the formation of less-dense ice crystals is suppressed. B) Increasing the pressure decreases the temperature of maximum density for freshwater because the formation of bulky ice crystals is inhibited. C) Decreasing amounts of dissolved substances inhibits the formation of hydrogen bonds, which restricts the number of ice crystals that can form. D) Decreasing pressure increases the number of water molecules in a given volume and inhibits the number of ice crystals that can be created.