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TLS Online TPP Program

#Question id: 9213

Suppose you attend a town meeting at which some experts tell the audience that they have performed a cost-benefit analysis of a proposed transit system that would probably reduce overall air pollution and fossil fuel consumption. The analysis, however, reveals that ticket prices will not cover the cost of operating the system when fuel, wages, and equipment are taken into account. As a biologist, you know that if ecosystem services had been included in the analysis, the experts might have arrived at a different answer. Why are ecosystem services rarely included in economic analyses?

#Unit 9. Diversity of Life Forms

  1. Federal laws of the United States exclude their inclusion in any cost benefit analysis.

  2. They have a low value and are usually not cost effective.
  3. Ecosystem services only take into account abiotic factors that affect local environments.
  4. Their cost is difficult to estimate, and people take them for granted.
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TLS Online TPP Program

#Question id: 11998

#Unit 10. Ecological Principles

Of the following examples of ecological effect leading to an evolutionary effect, which is most correct? 
TLS Online TPP Program

#Question id: 11999

#Unit 10. Ecological Principles

Rachel Carson would most likely have endorsed which of the following statements?
TLS Online TPP Program

#Question id: 12000

#Unit 10. Ecological Principles

The graph below shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.

Which of the following is true concerning the thermal dependence of growth rate   between 25°C and 30°C in these populations?
TLS Online TPP Program

#Question id: 12001

#Unit 10. Ecological Principles

The  graph  below  shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.


Which population has the highest fitness at 25°C ? 
TLS Online TPP Program

#Question id: 12002

#Unit 10. Ecological Principles

Which of the following can be correctly concluded from this experiment?
TLS Online TPP Program

#Question id: 12003

#Unit 10. Ecological Principles

The  graph  below  shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.

If all three populations were mixed together and placed at 37°C, which of the following would  be most likely to happen?