5 Written questions
5 Matching questions
- Which of the following statements about biological diversity is NOT true?
A. Scientists estimate that 10-50 million species exist.
B. Biodiversity is described in terms of genetic, community, and landscape diversity.
C. Biodiversity refers to the variety of life on Earth.
D. Biodiversity is evenly distributed throughout the biosphere.
E. Many species that are in danger of extinction have not been identified and studied.
- Which of the following organisms is NOT an example of an alien or exotic species?
A. zebra mussels introduced to the Great Lakes
B. dandelions planted by pioneers as salad greens
C. the mongoose brought to Hawaii to control rats
D. water hyacinths
E. All of these are examples of introduced alien species.
- Biodiversity "frontiers" are areas that
A. have high rates of extinction.
B. lack diversity.
C. have many more species than formerly thought.
D. are replacing native species with exotic species.
E. are fragile in comparison with other ecosystems.
- The greenhouse effect is
A. due to increased sunlight in recent years.
B. caused by increased plant life and photosynthesis.
C. a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
D. a manmade hazard due to decreased levels of carbon dioxide and ozone in the atmosphere in recent years.
E. All of the choices are correct.
- Conservation biology supports all of the following ethical principles EXCEPT
A. biodiversity is desirable for the biosphere and humans.
B. all animals have the same rights or legal status as humans.
C. biodiversity has value in and of itself regardless of any practical human benefits.
D. extinctions due to human actions are undesirable.
E. the complex interactions of ecosystems support biodiversity and are desirable.
- a C. a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
- b E. All of these are examples of introduced alien species.
- c C. have many more species than formerly thought.
- d B. all animals have the same rights or legal status as humans.
- e D. Biodiversity is evenly distributed throughout the biosphere.
5 Multiple choice questions
- D. A, B, and C are correct.
- B. sink
- E. All of the choices are correct.
- A. flagship species.
- C. Endangered wild species often become extinct due to different combinations of factors.
5 True/False questions
_______ when the number of individuals taken from a wild population is so great that the population becomes severely reduced in number.
A. Overexploitation occurs
B. A source population is formed
C. An "edge effect" occurs
D. Eutrophication occurs → A. Overexploitation occurs
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. → B. Keystone species are defined as a population subdivided into several small isolated populations due to habitat fragmentation.
Which of the following are of extinction?
A. habitat loss
B. exotic species
D. A, B, and C only are correct.
E. A and C only are correct. → D. A, B, and C only are correct.
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. → C. If biodiversity cannot maintain the biogeochemical cycles, then technology will have to artificially create those cycles.
In spite of hundreds of millions of dollars spent on insecticides targeted at pest control for agricultural and medical purposes, man has been unable to drive any to extinction. On the other hand, the extinction of many species of birds, fishes, plants, and insects species have occurred as a result of
D. habitat destruction.
E. scientific collecting. → D. habitat destruction.