The renewable fuel mandate passed by the U.S. Congress
A. requires gasoline producers include higher quantities of ethanol in fuel each year or pay a fine.
B. requires that ethanol be made from cellulose.
C. requires that ethanol be made from corn.
D. All of the statements are requirements.
Answer: D
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Which process is responsible for Earth's magnetic field? In which layer does this process occur?
A) Radiation; upper mantle B) Subduction; lower mantle C) Convection; outer core D) Crystallization; inner core
A pheromone is
a. a new form of chemical insecticide awaiting approval by FIFRA b. a strong herbicide c. a species-specific chemical sex attractant d. a bloodstream chemical that controls an organism's growth and development e. a safe, natural pesticide
Between 2000-2015 the developing world accounted for what percent of the growth of megacities?
A. 30% B. 70% C. 90% D. 50% E. 10%
Radon ________
A) binds with hemoglobin, preventing binding with oxygen B) may cause lung cancer when inhaled C) contributes to the breakdown of the ozone layer D) in the atmosphere limits the availability of sunlight for plants E) is formed by the breakdown of the ozone layer