Chapter 38- Conservation Biology 22 Correctly Answered Questions Latest Update

Which best describes how the atmosphere's CO2 content was regulated before the Industrial Revolution? {Ans: CO2 was released by organisms as a by-product of cellular respiration; a similar amount of CO2 was absorbed by plants and other producers.}An ecological landscape {Ans: is composed of interacting ecosystems}Current rates of extinction may be _____ those of the past 100,000 years. {Ans: 1,000 times higher than}Africa is much larger than Europe. Why doesn't it have much more fresh water? {Ans: Much of its land area is covered with desert.}Which continents currently have sufficient water to meet the needs of their populations? {Ans: North America, South America, Africa, and Australia}Which continent has the highest ratio of available fresh water to population size? {Ans: Australia}Most models predict that continued increases in atmospheric CO2 will cause global temperatures to _____ over the next 100 years {Ans: increase by 2-7 degrees Celsius}Which continent has more than 12,000 cubic kilometers of water available per year? {Ans: Asia}A new and expanding field that uses ecological principles to develop methods to restore degraded areas to their natural state is called {Ans: restoration ecology}Policymakers banned the routine use of DDT as an