In a dry climate, ____
A) potential evaporation and transpiration exceed precipitation
B) there are no plants
C) air temperatures seldom drop below freezing and days are always hot
D) winters are short, but cold
A
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Why has tuberculosis become so difficult to treat after being diagnosed?
A. genetic resistance to antibiotics B. many of the infected show no symptoms C. high human population densities D. it resides in parts of the body that make drug delivery difficult
What was the Cold War?
A) an armed conflict between the United States and the USSR that lasted from 1946-1991 and included occupation of several European countries by the United States B) armed warfare between Eastern Europe and Western Europe from 1968 -1973 C) armed warfare between Eastern Europe and Western Europe that lasted from 1986-1991 D) the nickname given to efforts by the cold, northern countries of Europe to resolve their energy crisis in the 1990s to avoid deaths caused by hypothermia E) an ideological struggle between the United States and the former Soviet Union that lasted from 1946-1991, and included Soviet occupation of several European countries
Wetland protection is one of the most controversial provisions of the ________ because opponents believe that the legislation is ________.
A. Clean Water Act; an infringement on their use of private property B. Clean Water Act; ineffective because it does not prevent pollutants C. Land Use Act; an infringement on their use of private property D. Clean Air Act; ineffective because it does not prevent pollutants E. Endangered Species Act; an infringement on their use of private property
Asthma is a serious and widespread disease related to air pollution. Symptoms of asthma include impaired breathing resulting from constricted air passages, a disorder of the
A) digestive system. B) cardiovascular system. C) endocrine system. D) immune system.