More Severe An Inherited Disease example essay topic
411 words
Explanation: The first part of the sentence is a statement: the more severe an inherited disease is, the more likely it is that the genes causing it will be eliminated by natural selection. The word "consequently" suggests that the missing words must, together, make a statement in keeping with this assumption. A is the correct answer. A disease that is "lethal" is very severe. Because, according to the statement, the most severe diseases are likely to be most strongly acted against and are therefore least likely to recur, one would expect "lethal" diseases to be very "rare". B is incorrect. It is possible that diseases that are "untreated" would be "dangerous", but the first part of the sentence suggests that the expectation concerns the elimination of hereditary diseases, not their dangerousness. C is also incorrect.
There is no information in the sentence that suggests that the more "unusual" a disease is, the more "unusual" a disease is, the more "refractory" (resistant to treatment) it will be. D is not the correct answer. It is not unlikely that "new" hereditary diseases would be "perplexing", but the first part of the sentence suggests that the expectation concerns the elimination of hereditary diseases, not whether they are perplexing. E, the last choice, is not the correct answer. The idea that "widespread" diseases are "acute" does not follow from the statement give. Rather, the opposite would be expected, given the assumption.
Answer: (A) 2. Although ancient tools were -- -- preserved, enough have survived to allow us to demonstrate an occasionally interrupted but generally -- -- progress through prehistory. (A) partially... noticeable (B) superficially... necessary (C) unwittingly... documented (D) rarely... continual (E) needlessly... incessant 2 Explanation: The first missing word describes how ancient tools were preserved. The phrase "enough have survived" indicates that not all survived, and the word "Although" indicates that the tools were preserved in a way that would not lead you to expect enough to survive. The second missing word describes a progress through prehistory. The word "but" suggests that the word that fills the second blank must contrast with the idea of occasional interruption.
D is the correct answer. It is logical to say that enough tools have survived in spite of their being "rarely" preserved. A "continual" progress contrasts with one that is occasionally interrupted. Answer: (D).
