Which of the following is true of chiral drugs that are administered as single enantiomers?
A) They all have the R configuration.
B) They all have the S configuration.
C) Their enantiomers are always highly toxic.
D) None of the above is correct.
D
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Which nation accounts for more than 30% of the international student population in the United States?
A) Mexico B) Canada C) India D) China E) Iran
________ metamorphism tends to occur in regions where massive amounts of sedimentary or volcanic materials accumulate in a subsiding basin, pushing older rocks further into the interior
A) Contact B) Hydrothermal C) Burial D) Regional
What kind of temperature and pressure conditions will exist in a subduction zone metamorphic environment?
A) Low temperature and low pressure B) Low temperature and high pressure C) High temperature and low pressure D) High temperature and high pressure
In which of the following climates would vegetation be least likely to develop drought resistant characteristics?
a. low latitude desert b. humid continental, hot summer c. tropical savanna d. Mediterranean