5 Written questions
5 Matching questions
- Global warming
A. is an increase in the average temperature of the Earth.
B. may cause a rise in the sea level that will inundate coastal wetlands.
C. may cause extinction of some land organisms, but biodiversity may increase.
D. is increased by elevated levels of greenhouse gasses in the atmosphere.
E. All of the choices are correct.
- Forests and other ecosystems may decrease the chances of flooding in an area due to their water-holding capacity.
- The situation with major oceanic fishing areas is
A. good, since the oceans are so large, they are the one remaining natural ecosystem that is not susceptible to extinction.
B. generally positive, with only one or two of the 15 major oceanic fishing areas over-exploited.
C. generally negative, with 11 of the 15 major oceanic fishing areas overexploited.
D. positive for the bottom dwellers that are protected but negative for the schools of swimming fish.
E. negative for the bottom dwellers that are over-fished by trawling but positive for the schools of swimming fish that can easily get away.
- Each year, both forests and prairie grasslands are burned by fires, some started by lightning strikes and others caused by humans. However, many grasses are fire-adapted or dependent upon occasional fires to maintain their prairie system. Some pine trees are so dependent upon fire that they cannot propagate without it. Does this contradict our concerns about air pollution and carbon dioxide and carbon monoxide levels in the atmosphere?
A. Yes; fire is detrimental and further research should be done to correct the apparent biological adaptations that contradict eliminating all fires possible.
B. Yes; fire is detrimental in natural environments and these apparent adaptations are artificial situations due to human distortion of natural systems.
C. No; the environmental concerns listed in the text are all extremist concerns with no basis in factual data.
D. No; as with all complex systems, it is a matter of proportion; the current trend towards atmospheric pollution is far beyond the Earth's normal low level of natural fires, the effects of which were easily handled.
- Which of the following statements concerning the indirect values of biodiversity is NOT correct?
A. Trees take up carbon dioxide and release oxygen when they photosynthesize.
B. Forests act as a sponge to soak up water and release it during drier periods.
C. If biodiversity cannot maintain the biogeochemical cycles, then technology will have to artificially create those cycles.
D. Diverse organisms are critical in breaking down wastes and immobilizing pollutants.
E. All of the choices are correct. None of these statements are incorrect.
- a C. generally negative, with 11 of the 15 major oceanic fishing areas overexploited.
- b True
- c C. If biodiversity cannot maintain the biogeochemical cycles, then technology will have to artificially create those cycles.
- d E. All of the choices are correct.
- e D. No; as with all complex systems, it is a matter of proportion; the current trend towards atmospheric pollution is far beyond the Earth's normal low level of natural fires, the effects of which were easily handled.
5 Multiple choice questions
- C. A lake can die due to eutrophication, which is a lack of nutrients.
- D. A, B, and C are correct.
- D. contributions to biogeochemical cycles.
- A. Overexploitation occurs
5 True/False questions
The use of wheat, corn, rice and other crops derived from wild ancestors is an example of the _______ value of biodiversity.
C. consumptive use
D. climatic regulation → C. consumptive use
Introduction of alien or exotic species into new ecosystems occurs by
A. colonization when new settlers arrive in an area.
B. accidental transport by ship or plane without anyone's knowledge.
C. agricultural and horticultural activities.
D. All of the choices are correct.
E. B and C only are correct. → D. All of the choices are correct.
Which of the following statements about extinction is TRUE?
A. Overexploitation by hunting and fishing is the major threat to tropical animals and plants.
B. Without human activity, all species would survive and there would be no extinctions.
C. Endangered wild species often become extinct due to different combinations of factors.
D. Commercial hunting and fishing are careful not to deplete animal reserves.
E. Introduction of new exotic species helps preserve biodiversity and slow extinction. → C. A lake can die due to eutrophication, which is a lack of nutrients.
Biodiversity is described in terms of genetic, community, and landscape diversity.
True False → D. contributions to biogeochemical cycles.
Preliminary studies indicate that biodiversity maximizes resource acquisition and retention within an ecosystem.
True False → True