Which of the following air masses would have its origin over the Gulf of Mexico and the Caribbean Sea?
a. mP
b. mT
c. cT
d. cP
e. cA
b
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Summarize the experience of British and French influence and control in Southwest Asia and North Africa.
What will be an ideal response?
The International Whaling Commission moratorium on commercial whaling was imposed in 1986 . Following this:
a. Worldwide commercial whaling was completely eliminated. b. There was no change in the number of whales killed outside U.S. waters. c. Whale killing declined, and only 1,400 whales were killed in 2008, compared to over 42,000 in 1970 . d. Even Japan stopped commercial whaling. e. Commercial whaling actually increased in some areas outside the U.S.
In 1948 in Donora, Pennsylvania, the routine release of toxins into the air became a deadly fog because of
A) a chemical spill in the nearby Monongahela River. B) greatly increased activity of the nearby industries. C) a thermal inversion and stagnant weather conditions. D) the failure of the chemical scrubbing systems on smokestacks.
Which of the following best characterizes the function of introns?
A) They serve only as spacers. B) They serve only as enzymes to properly splice exons. C) They are most frequently spacers and rarely function as splicing enzymes. D) they are most frequently splicing enzymes and rarely function as spacers.