The holes that have begun to form in the part of the atmosphere that protects life on Earth from destructive ultraviolet rays are due to
a. increased ozone and carbon dioxide.
b. decreased ozone due to emissions of chlorofluorocarbons.
c. increased chlorofluorocarbons and ozone.
d. global warming and acid rain.
e. international governmental regulations on climate change.
B
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The main lesson from the in-depth box about Costa Rica is
that the best way to lower infant mortality rates for infants born to poor parents in less-developed countries is to: a. improve per capita income through rapid economic growth. b. increase the number of doctors and nurses in a country. c. acquire improved medical technology. d. provide safe drinking water, adequate nutrition, and basic health care for poor mothers and their newborns.
The majority of Russians are strongly committed to democracy
Indicate whether this statement is true or false.
Which of the following statements is true of affirmative action?
A) It involves offering special admission considerations to members of minority groups. B) It is the deliberate and public act of refusing to obey laws thought to be unjust. C) Its primarily goal is to eliminate discrimination against people who have no minority status. D) It is a standard under which a law or action must be necessary to promote a compelling state interest. E) It was first developed under President Franklin D. Roosevelt.
The group that receives the treatment or test stimulus or factor under study is called the
a. Comparative group b. Control group c. Simulation group d. Experimental group