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.
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.
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.
A _______ population survives in unfavorable conditions, has a birthrate that barely equals the death rate, and receives new members from other fragmented populations.
Rosy periwinkle, the nine-banded armadillo, and some species of fungus and bacteria have _________ value to man.
C. consumptive use
aD. A, B, and C only are correct.
cA. Tropical rain forest land contains rich soil that is desirable as farmland.
5 Multiple Choice Questions
E. All of the choices are correct.
A. The edge effect
C. If biodiversity cannot maintain the biogeochemical cycles, then technology will have to artificially create those cycles.
B. all animals have the same rights or legal status as humans.
5 True/False Questions
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. → B. all animals have the same rights or legal status as humans.
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. → 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.
When habitats are fragmented so that populations are subdivided into several small and isolated groups, they form a
A. sink population.
B. biodiversity hotspot.
C. keystone species.
D. source population.
E. metapopulation. → E. metapopulation.
_______ is (are) associated with 85% of the cases of threatened and endangered species.
B. Habitat loss
E. Exotic species → E. All of these are examples of introduced alien species.
As "civilization" spread around the world, several species benefitted greatly from new human-made habitats, including the house fly, the Norwegian rat, and many crop plants. Generally, with expansion of human populations and agriculture,
A. there has been an increase in biological diversity.
B. biological diversity has remained the same, with human-associated organisms replacing the few natural species displaced.
C. biological diversity has decreased but mainly with the elimination of pests by humans.
D. biological diversity is decreasing at an accelerating rate with the elimination of many unstudied species. → D. biological diversity is decreasing at an accelerating rate with the elimination of many unstudied species.