Which of the following correctly describes the relationship between the R,S system and the +/- system associated with optically active compounds?
A) All R enantiomers are (+).
B) All S enantiomers are (+).
C) No S enantiomers are (+), but some R enantiomers are (-).
D) There is no general relationship between the R,S designations and the +/- designations.
D
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Volcanic Island Arcs form at convergent plate boundaries.
Answer the following statement(s) true (T) or false (F)
Today, the United States leads the world in estimated coal reserves
Indicate whether the statement is true or false
Circulation in which of the following oceans is particularly sensitive to changes in its deep-water circulation pattern that dramatically and abruptly affect climate?
A) The North Atlantic Ocean B) The North Pacific Ocean C) The South Atlantic Ocean D) The South Pacific Ocean E) The Southern Ocean
The mountain pine beetle has been responsible for all but ________
A) more crown fires in trees B) the deaths of large amounts of trees C) increased runoff and flash floods D) increased numbers of trees falling onto roads E) increased nitrogen fixation in soil