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 Administrator
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#36462
Complete Question Explanation
(See the complete passage discussion here: lsat/viewtopic.php?t=14508)

The correct answer choice is (C)

You should select a response that adequately refl ects the fl ow of the passage, which is that of
introduction and defi nition, followed by discussion of diffi culties and solution, followed by
discussion of results and some implications.

Answer choice (A): This answer choice fails to describe the fi rst paragraph in any way, and that
omission alone eliminates this answer. In addition, the passage does not describe the DNA sequence
of lichen-forming fungi, the passage only mentions that scientists have discovered a sequence.

Answer choice (B): Perhaps the best reason for eliminating this answer choice is the reference to
“application of these fi ndings in support of an evolutionary theory.” First, there term “application”
may be questions, and, in lines 50-53, the author challenges a theory instead of supporting a theory.
While it is possible that the contradiction implies a different hypothesis, the author never argues in
favor of another proposal, so this response is unjustifi ed.

In addition, this response can also be described as incomplete because it fails to reference the
diffi culties scientists had in separating lichen-forming fungi from lichens.

Answer choice (C): This is the correct answer choice. Some test takers will eliminate this response
because they correctly observe that the second, not the last, paragraph discusses the resolution of
diffi culties, and this response appears to group the resolution and implication together. However, you
are instructed to choose the best of fi ve, which means that sometimes you will choose an imperfect
response. Punctuation aside, the description in this response is very accurate. The fi rst paragraph
defi nes lichens, the second describes diffi culties and a resolution in studying lichen-forming fungi,
and the third paragraph discusses the implications of research. Even though this is an obvious case
of trickery on the part of the LSAT test-writers, they would probably argue that this response does
grammatically refl ect the structure by separating the passage into concepts covered rather than
paragraphs, and claim that the omission of the last semicolon was merely a stylistic variation, and
not intended to imply that the fi nal two items in the list appeared in the same paragraph. In a way,
you could have predicted this because the exceedingly long second paragraph actually should have
been broken into two paragraphs: one on diffi culty, the other on resolution.

Answer choice (D): The passage did not describe the symbiotic relationship that constitutes lichens
in-depth, and the passage never discussed a study distinguishing parasitic from symbiotic fungi.

Answer choice (E): Since this response does not reference the fact that scientists now can more
accurately classify lichen-forming fungi from fungi, this response is incomplete. Even more
convincing is that the passage did not discuss a “delineation of the implications these problems have”
(instead, the passage discussed the implications of the new discoveries).
 est15
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#16377
Could you explain why A is incorrect? All three elements seemed to me to be in the passage.
 Emily Haney-Caron
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#16390
Hi est15,

You are correct that those elements are all basically present in the passage, but organization questions such as this one are really asking you to identify the way the passage was structured/how information was presented, and that requires you to consider the organizational structure the author was using rather than just identifying ideas conveyed. Here, lines 1-14 define lichens, lines 15-33 discuss the difficulty of classifying them, and then the last portion of the passage focuses on explaining a solution to these difficulties. That, then, is the best answer for the organizational structure.
 sherrilynm
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#45021
Administrator wrote:Complete Question Explanation
While it is possible that the contradiction implies a different hypothesis, the author never argues in
favor of another proposal, so this response is unjustifi ed.
I thought the last few lines..."Given the new layout..." was a new hypothesis? Can someone explain?
 Francis O'Rourke
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#45112
The evolutionary theory (described by the author as an "assumption") in question in the final paragraph was that "parasitic interactions inevitably evolve over time to a greater benignity and eventually to symbiosis." The author presents evidence of harmful and benign parasitism to show that this evolutionary theory does not hold.

As the administrator wrote, you may infer a new evolutionary hypothesis, which can be supported by these findings. The author however clearly stops at pointing out that the old theory is wrong. In order for answer choice (B) to be true, we would need to identify some theory that the passage applies the findings to support. It's not good enough to say that they support the "not-evolving-towards-parasitic-mutualism" theory, since the negation of one theory is not a necessarily a new theory.

The family tree is not a new theory. The findings may refine or reshape the family tree, but the author is not throwing out the theory (it's questionable to even call this a theory) of a genetic family tree in support of something else.

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