Why does replacing the hydroxyl groups on cellulose with nitro groups result in a polymer that is soluble?
A) The cellulose can no longer hydrogen bond.
B) The cellulose becomes more polar.
C) The cellulose fragments into smaller, more soluble pieces.
D) The cellulose becomes locked into place by bridging nitro groups.
E) none of the above
Question 2
Suggest why withdrawal symptoms are observed after repeated use of the hallucinogen MDA but not after repeated use of LSD, which is a more potent hallucinogen.
A) MDA is picked up by a receptor site that creates the sense of nausea.
B) MDA has more side effects, which the body learns how to counteract after repeated use.
C) The effective dose of MDA is many times greater than is the effective dose of LSD.
D) MDA is a much longer acting drug. Once in the blood stream it can remain there for days.
Variation in climatic conditions result in geographic variation in the distribution of biome types a
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