1 & 2
Of the following organisms, which occupies the lowest trophic level?
Deer
Members of an r-selected species characteristically
reach sexual maturity quickly
Which of the following is a commercially used method for harvesting trees and is most likely to lead to a fragmented landscape with serious impacts on biodiversity?
Clear-cutting
The majority of atmospheric mercury is produced by
coal-burning power plants
Which of the following substances is released by CFC's and catalyzes a chain reaction that breaks down ozone in the upper atmosphere?
Chlorine
After running tests, the research team determined that mercury levels in invertebrates and small fish in the ecosystem were very high. In this ecosystem, what role did the otters occupy?
Indicator Species
Most volcanism in the world is associated with
Plate Boundaries
A renewable source
Solar
A state highway was constructed over wetlands. The state obtained a permit to fill the existing wetlands in accordance with the provisions of the Clean Water Act in 1972, and agreed to create another wetland. This trade-off approach to addressing an environmental issue is known as
mitigation
Which of the following compounds is NOT involved in the depletion of stratospheric ozone?
Carbon Dioxide
Ammonia is converted to nitrite, then to nitrate.
Nitrification
By the year 2050, world population is expected to approach 10 billion. If the current population trends continue, which region of the world will most likely experience the majority of the growth?
Africa and Asia
Overgrazing of grasslands can lead to reduced range quality. Two of the major effects of overgrazing are
erosion and desertification
The presence of which of the following in soil is most likely to neutralize acid rain?
Limestone
Addressed the issue of stratospheric ozone depletion
Montreal Protocol
Which of the following is the best example of a keystone species?
Sea Otter
Which of the following is the best method for preventing soil erosion in an agricultural area?
Terrace Farming
Currently proven global reserves are expected to be largely exhausted within the next 50 years.
Oil
Which of the following characteristically produces non-point-source pollution?
Erosion from agricultural land
Contains an amendment that allows private landowners to modify their property under a habitat conservation plan
Endangered Species Act
This biome contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round.
Desert
If the population of a country is growing at a rate of 1.75 percent per year, the population will double in approximately how many years?
40 years
The major cause for the decline in the worldwide catch of fish since 1990 is
overfishing
Catalytic converters reduce which of the following pairs of pollutants in car exhaust?
Carbon monoxide and hydrocarbons
Which of the following is a greenhouse gas that comes only from human sources?
Chlorofluorocarbons