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An ecology magazine regularly publishes articles on tree diseases. Thi

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An ecology magazine regularly publishes articles on tree diseases. Thi  [#permalink]

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New post 05 Jan 2019, 06:21
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An ecology magazine regularly publishes articles on tree diseases. This year, the number of articles on Ophiostoma ulmi, the fungus that causes Dutch elm disease, is significantly smaller than the number of such articles that appeared last year. Clearly, fewer researchers studied Ophiostoma ulmi this year than did so last year.

Which of the following, if true, weakens the above conclusion?


A. Many researchers publishing articles are currently studying Stegophora ulmeay a fungus that causes elm leaf spot.

B. Since its introduction, Dutch elm disease has killed half of the elm trees in North America.

C. Research on Dutch elm disease that focuses on prevention receives more funding than research that focuses on finding a cure.

D. A new strain of the fungus Rhytisma acerinum infested maple trees at an unprecedented rate this year.

E. All articles go through at least a one-year review process before publication.

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Re: An ecology magazine regularly publishes articles on tree diseases. Thi  [#permalink]

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New post 05 Jan 2019, 06:27
IMO E

prethink: if the articles published are not true representation of the research on Ophiostoma ulmi this year than did so last year.

A. Many researchers publishing articles are currently studying Stegophora ulmeay a fungus that causes elm leaf spot.--incorrect

B. Since its introduction, Dutch elm disease has killed half of the elm trees in North America.---incorrect

C. Research on Dutch elm disease that focuses on prevention receives more funding than research that focuses on finding a cure.---irrelevant

D. A new strain of the fungus Rhytisma acerinum infested maple trees at an unprecedented rate this year.--incorrect, irrelevant

E. All articles go through at least a one-year review process before publication---correct, same as prethinking
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Re: An ecology magazine regularly publishes articles on tree diseases. Thi  [#permalink]

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New post 05 Jan 2019, 06:55
An ecology magazine regularly publishes articles on tree diseases. This year, the number of articles on Ophiostoma ulmi, the fungus that causes Dutch elm disease, is significantly smaller than the number of such articles that appeared last year. - This is the Premise.

Clearly, fewer researchers studied Ophiostoma ulmi this year than did so last year. - This is the conclusion of the argument.

Which of the following, if true, weakens the above conclusion?

For weakening the conclusion, we should be looking at alternate explanation which is linked to the premise.


A. Many researchers publishing articles are currently studying Stegophora ulmeay a fungus that causes elm leaf spot. - Out of Scope. No one cares about what the researchers are studying, we are focusing on why the number of articles are lesser this year.

B. Since its introduction, Dutch elm disease has killed half of the elm trees in North America. - Out of Scope. Again no one should bother about what the introduction of the disease did.

C. Research on Dutch elm disease that focuses on prevention receives more funding than research that focuses on finding a cure. - Strengthens the conclusion. If the research focuses on prevention, then the disease should be studied more leading to a larger number of articles on the disease.

D. A new strain of the fungus Rhytisma acerinum infested maple trees at an unprecedented rate this year. - Out of Scope.

E. All articles go through at least a one-year review process before publication. - Bingo This would weaken the conclusion as it gives an alternate explanation to why the number of articles this year would be lesser than last year.
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An ecology magazine regularly publishes articles on tree diseases. Thi  [#permalink]

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New post 15 Jan 2019, 03:44
Bunuel wrote:
An ecology magazine regularly publishes articles on tree diseases. This year, the number of articles on Ophiostoma ulmi, the fungus that causes Dutch elm disease, is significantly smaller than the number of such articles that appeared last year. Clearly, fewer researchers studied Ophiostoma ulmi this year than did so last year.

Which of the following, if true, weakens the above conclusion?


A. Many researchers publishing articles are currently studying Stegophora ulmeay a fungus that causes elm leaf spot.

B. Since its introduction, Dutch elm disease has killed half of the elm trees in North America.

C. Research on Dutch elm disease that focuses on prevention receives more funding than research that focuses on finding a cure.

D. A new strain of the fungus Rhytisma acerinum infested maple trees at an unprecedented rate this year.

E. All articles go through at least a one-year review process before publication.


KAPLAN OFFICIAL EXPLANATION:



E

Conclusion: Fewer researchers studied Ophiostoma ulmi this year than last year.

Evidence: This year the number of articles on Ophiostoma ulmi is significantly smaller than the number of such articles that appeared last year.

Assumption: Researchers always write and publish articles in the same year the research occurs.

The conclusion is based on the assumption that there's an exact correspondence between the number of articles published on a given topic in a certain year and the number of researchers researching that topic. If, as (E) states, all articles are delayed at least a year, then the number of articles published will not necessarily correspond with the number of researchers. This casts doubt on the assumption, so it is correct.

(A) says nothing about whether the number of researchers studying Ophiostoma ulmi increased or decreased. (B) is wrong because the extent of Dutch elm disease is outside the scope of the question, which is only concerned with how many people are studying the fungus that causes the disease. (C)'s information is irrelevant to the actual number of research studies completed. (D) concerns a different type of fungus, so it is incorrect And, if anything, this would strengthen the argument by giving a possible reason for a decline in research related to Ophiostoma ulmi.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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An ecology magazine regularly publishes articles on tree diseases. Thi &nbs [#permalink] 15 Jan 2019, 03:44
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