Current ethanol production in Brazil is different from ethanol production in the United States because in Brazil,
A) special enzymes that break down cellulose into sugars are used.
B) ethanol is used to heat homes and generate electricity.
C) sugar cane is used instead of corn.
D) natural gas is used to generate ethanol.
C
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Which of the following is not an economic service provided by marine ecosystems?
a. source of animal and pet feed b. nutrient cycling c. provides harbors and transportation routes d. provides employment e. source of minerals, oil, and natural gas
Which of the following processes is NOT considered physical weathering?
A. prying by plant roots B. thermal expansion C. frost wedging D. near-surface fracturing E. oxidation
What kind of volcano erupts runny lava?
A. cinder cone B. shield C. composite D. basaltic
Economic and political cooperation in the European Union takes the form of all but which of the following?
A) Subsidies are provided to economically depressed areas. B) Transfer of finished products between countries is simplified. C) With few exceptions, citizens may live in one country but work in another without political difficulty. D) Every member country must adopt the Euro currency. E) A European Parliament is elected by member states.