In which of the following is the amino nitrogen also part of the side chain?
A) cysteine
B) glycine
C) proline
D) tryptophan
C
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Why is there a difference in the heat budget at various latitudes despite the Earth as a whole having a balanced heat budget? What happens at polar and tropical latitudes?
The oceans are a key component in the global climate system. Why?
a) oceans absorb a major amount of the increased atmospheric heat, and climate change results from this b) increased storm activity results from additional evaporation c) melting sea ice changes the albedo of the surface ocean d) ocean circulation is affected by warmer temperatures e) all of the above
Why is oxygen usually an oxidizing agent?
A. It is a very electronegative element. B. It likes to be oxidized. C. It does not undergo reduction. D. It is very abundant and so it is easier to react than nitrogen. E. all of the above
What two 19th century technologies were key to encouraging settlement in the Great Plains?
A) Automobiles and the steel plow. B) The railroad and the automobile. C) The automobile and the airplane. D) The steel plow and the railroad.