The effects of drought in the United States ____
a. are unpredictable, and strong damage occurs typically once every twenty years
b. cause billions of dollars of damage per year
c. are mostly due to short-term events
d. do not affect the eastern U.S.
e. do not affect the northern U.S.
ANSWER: b
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How does a catalyst increase the rate of a reaction?
A. It raises the activation energy of the reactants, which makes the reaction proceed faster. B. It is neither created nor consumed in a reaction. C. It increases the energy difference between the reactants and products. D. It has nothing to do with the rate of reaction. E. It lowers the activation energy.
Many harvested marine animals are sustainable because they are being caught below the maximum
sustainable yield. Indicate whether the statement is true or false.
Primers are involved in which of the following?
A) synthesis of only the lagging strand daughter B) synthesis of only the leading strand daughter C) synthesis of both daughter stands D) None of the above, primers are not involved in the synthesis of either daughter strand.
What describes the pattern of more energy arriving at the tropics and less energy arriving at the poles?
A. latitude B. season C. apogee D. altitude E. ocean currents