(B) Commercial publishing is now catering to a different community of book readers than the book business has served in the past.
(C) The new profits from methods introduced by communications-entertainment management will encourage writers of literary talent to persevere against the odds.
(D) The narrowed range of books coming to the public is directed toward a more discriminating audience.
(E) The public is unaware of the trend in the publishing industry to specialize in books that produce blockbuster sales.
6. It often happens that some crisis or opportunity induces people to find a practical use for things that originally had no serious purpose. As an example of this principle, consider the dolls and mannequins, programmed to move and built for the delight of the wealthy in the eighteenth century, which were forerunners of the modern computer, likewise, it is almost certain that the first domesticated animals were pets. Domestication of animals seems to have arisen as an amusement long before it had practical application.
Which of the following, if true provides another example in support of the principle mentioned above?
(A) The discovery of America was a by product of the search for ginger, cloves, pepper, and cinnamon.
(B) Children's games often imitate adult work .
(C) The spyglass was simply a source of diversion until its commercial and scientific potential was recognized, and its power of magnification suitably improved.
(D) In certain cultures horses are used exclusively for pleasure, and never for work, even though in those culture people are forced to work arduously in the absence of laboring animals.
(E) The persons who constructed moving dolls and mannequins in the eighteenth century were also clockmakers.
7. Pharmaceutical firms are now producing analogues (that is, chemical variants) of endorphins, peptides thought to carry messages that, when transmitted among brain cells, result in pain relief. The firms claim that the analogues, when injected into the bloodstream, will provide effective and long-lasting pain relief by augmenting the action of peptides already found in the brain.
The claim of the pharmaceutical firms would be weakened if it were true that
(A) endorphins remain active in the brain for longer periods of time than do the brain's other types of neurotransmitters
(B) some peptides have been found in parts of the body other than the brain, such as the alimentary canal and the skin
(C) analogues of peptides are easier and less expensive to produce in the laboratory than the peptides themselves
(D) analogues of the peptides that are found naturally in the body are often filtered from the blood before the blood circulates in the brain
(E) endorphins interact chemically both with other naturally occurring peptides and with the brain's other neurotransmitters
Questions 8-11
In a biologist's laboratory, there are seven unlabele jars. The biologist knows that each of the jars contains dormant bacteria of one of the following types: T, U, V, W, X, Y, Z. She also knows that no two of the jars contain the same type of bacteria. She wishes to identify accurately the type of bacteria in each jar by placing samples of the bacteria into various growth mediums and observing their growth She has only the following information to use in interpreting the results:
When placed in a suitable medium, dormant bacteria will grow.
Types U and V each grow only in medium 1.
Type Y grows only in medium 2.
Type X grows only in medium 3.
Type W grows both in medium 1 and in medium 3 but in no other medium.
Type T and Z each grow both in medium 2 and in medium 3 but in no other medium.
8. If the biologist places samples of bacteria from one of the jars into mediums 1, 2, and 3 and finds that the bacteria grow only in medium 3, she can properly conclude which of the following?
(A) The bacteria are of type X.
(B) The bacteria are of type W.
(C) The bacteria are of either type W or type X, but which of the two they are cannot be determined without additional information.
(D) The bacteria are of type T, or type X, or type Y, but which of the three they are cannot be determined without additional information.
(E) The bacteria are of type W, or type X, or type Z, but which of the three they are cannot be determined without additional information.
9. The biologist CANNOT accurately differentiate which of the following pai
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