List the environmental factors and chemical properties that determine the rate of degradation of toxicants
What will be an ideal response?
Environmental factors such as temperature, moisture, available oxygen, and sun exposure can affect the rate of degradation of toxicants. The chemistry of the toxicant would determine how it is degraded and to what extent these environmental factors affect its degradation. Atrazine is an example of a toxicant that has variable persistence, depending upon environmental conditions. Biodegradable toxicants are quickly broken down under conditions that favor the sustenance of the organisms degrading them. DDT, PCBs, and toxicants used in the manufacture of plastics, however, resist breakdown under most environmental conditions, and oftentimes they are specifically designed not to degrade.
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Which Central Asian country has taken the lead on restoration of the Aral Sea?
A) Kazakhstan B) Mongolia C) Kyrgyzstan D) Tajikistan E) there have been no restoration efforts of the Aral Sea
Which part of Central Asia underwent the Soviet "Virgin Lands Campaign" of the 1950s?
A) central Kyrgyzstan B) northwestern Tibet C) southern Uzbekistan D) northern Kazakhstan E) Azerbaijan
Which of the following is NOT a technique for managing wildlife?
A. predator control B. introduction of exotic species C. habitat management D. establishment of refuges
Warm advection occurs when the
a. wind veers (changes direction in a clockwise manner) with height. b. wind backs (changes direction in a counterclockwise manner) with height. c. isotherms are parallel to the winds. d. wind veers with height and the isotherms are parallel to the winds. e. Sun angle is 90 degrees.