5 Written questions
5 Matching questions
- 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.
- Which of the following statements about keystone species is NOT true?
A. The extinction of keystone species can lead to other extinctions and a loss of biodiversity.
B. Keystone species are defined as a population subdivided into several small isolated populations due to habitat fragmentation.
C. Examples of keystone species are grizzly bears, bats, beavers and alligators.
D. The numbers of individuals in the keystone species in their respective community may or may not be excessively high.
- Which of the following statements about tropical rainforests is NOT true?
A. Tropical rain forest land contains rich soil that is desirable as farmland.
B. Cattle ranchers in South and Central America temporarily benefit from deforestation.
C. Tropical rain forests are being destroyed by farmers using slash-and-burn agriculture.
D. Government subsidies and roads are necessary to begin the process of deforestation on a large scale.
E. Logging is a serious threat to tropical rain forests, as less developed countries cut down their forests for rapid economic gain.
- Biodiversity is a resource of immense value. All of the following are ways in which biodiversity is directly valuable to humans EXCEPT
C. consumptive use.
D. contributions to biogeochemical cycles.
- 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.
- a D. contributions to biogeochemical cycles.
- b B. Keystone species are defined as a population subdivided into several small isolated populations due to habitat fragmentation.
- c 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.
- d C. a natural phenomenon due to absorption of sunlight and re-radiating of the heat.
- e A. Tropical rain forest land contains rich soil that is desirable as farmland.
5 Multiple choice questions
- C. bioinformatics.
- B. sink
- C. A lake can die due to eutrophication, which is a lack of nutrients.
5 True/False questions
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. → B. all animals have the same rights or legal status as humans.
Sustainable development is a pattern of resource use that attempts to preserve the environment while meeting the needs of humans in the present and future.
True False → A. The edge effect
The use of noncultivated fruit, animal skins, fiber, beeswax, and fish are examples of the ______ value of biodiversity.
A. agricultural use
B. medicinal use
C. consumptive use
D. contributions to the biogeochemical cycles → A. agricultural
Madagascar is considered a biodiversity "hotspot" because
A. it originated as a volcanic island.
B. it has lost nearly all of its native species to extinction.
C. it contains an unusually high concentration of species.
D. it has resisted habitat destruction that has caused extinctions elsewhere.
E. All of the choices are correct. → True
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. → E. metapopulation.