For humans, how many essential amino acids are there?
A) 0
B) 2
C) 3
D) 10
D
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The primary advantage of hydropower is that it ________
A) is the most economically feasible of all the renewable energy resources B) produces no environmental effects C) is widely available to all countries D) does not rely on fossil fuel to generate electricity E) is the oldest of the renewable energy resources
The Mississippi River has an average discharge of 17,300 cubic meters per second but the ________ River discharges 12 times more water than the Mississippi River
A) Colorado B) Amazon C) Yukon D) Nile E) Yangtze
Which Latin American or Caribbean country leads coffee production in the world?
A) Colombia B) Brazil C) Peru D) Honduras E) Costa Rica
Which of the following best indicates that a severe thunderstorm is about to produce a tornado?
A. a mammatus cloud B. a gust front C. a roll cloud D. a wall cloud