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In a study of the effect of pollution from underwater oil rigs on the

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In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post Updated on: 03 Jul 2018, 20:13
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Question Stats:

47% (01:35) correct 53% (01:51) wrong based on 112 sessions

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In a study of the effect of pollution from underwater oil rigs on the fish population in the rigs' vicinity, researchers compared fish caught in areas near oil rigs with those caught in areas more than a hundred miles away from any oil rig. Finding no differences in the health of the fish in the two catches, the researchers concluded that pollution from oil rigs poses no serious health hazard to the fish population in the rigs' vicinity.

Which one of the following, if true, most seriously weakens the researchers' argument?


A. Only a radius of ten miles around oil rigs was considered for the study

B. The fish ecosystems in the two areas sampled were not similar; one area was cold and overcast while the other was hot and sunny.

C. Pollution from oil rigs affects the mating, and therefore, egg-laying behaviour of fish

D. Only a small number of oil rigs are present underwater.

E. The research did not include the long-term of pollution on plants on which the fish survive.


Source: Experts Global

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Originally posted by pushpitkc on 03 Jul 2018, 01:13.
Last edited by Bunuel on 03 Jul 2018, 20:13, edited 1 time in total.
Formatted.
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Re: In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post 03 Jul 2018, 03:44
Ans should be E

Conclusion can be weaken based on following two concepts:-
1. Based on one fish it can't be generalized.
2. Research is not considering other factors.

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Re: In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post 03 Jul 2018, 06:19
1
pushpitkc wrote:
In a study of the effect of pollution from underwater oil rigs on the fish population in the rigs' vicinity, researchers
compared fish caught in areas near oil rigs with those caught in areas more than a hundred miles away from any
oil rig. Finding no differences in the health of the fish in the two catches, the researchers concluded that pollution
from oil rigs poses no serious health hazard to the fish population in the rigs' vicinity.

Which one of the following, if true, most seriously weakens the researchers' argument?

A. Only a radius of ten miles around oil rigs was considered for the study
B. The fish ecosystems in the two areas sampled were not similar; one area was cold and overcast while the other
was hot and sunny.
C. Pollution from oil rigs affects the mating, and therefore, egg-laying behaviour of fish
D. Only a small number of oil rigs are present underwater.
E. The research did not include the long-term of pollution on plants on which the fish survive.

Source: Experts Global


The main aim of the study is to determine the affect on the population of fishes, they conducted only the test on the health of the fish and deduced that the population is not affected in order to weaken the conclusion Option C provides valid explanation that the mating is affected which leads to reduced population.
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Re: In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post 03 Jul 2018, 20:05
praveenkuragodi wrote:
pushpitkc wrote:
In a study of the effect of pollution from underwater oil rigs on the fish population in the rigs' vicinity, researchers
compared fish caught in areas near oil rigs with those caught in areas more than a hundred miles away from any
oil rig. Finding no differences in the health of the fish in the two catches, the researchers concluded that pollution
from oil rigs poses no serious health hazard to the fish population in the rigs' vicinity.

Which one of the following, if true, most seriously weakens the researchers' argument?

A. Only a radius of ten miles around oil rigs was considered for the study
B. The fish ecosystems in the two areas sampled were not similar; one area was cold and overcast while the other
was hot and sunny.
C. Pollution from oil rigs affects the mating, and therefore, egg-laying behaviour of fish
D. Only a small number of oil rigs are present underwater.
E. The research did not include the long-term of pollution on plants on which the fish survive.

Source: Experts Global


The main aim of the study is to determine the affect on the population of fishes, they conducted only the test on the health of the fish and deduced that the population is not affected in order to weaken the conclusion Option C provides valid explanation that the mating is affected which leads to reduced population.




Well the conclusion is related to health hazards of oil rigs. It has nothing to do with the population. As per option C, we can not say anything about the health of fishes. Hence I suppose E to be the answer. C is a shell answer
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In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post 04 Jul 2018, 01:14
1
nipun21 wrote:
praveenkuragodi wrote:
pushpitkc wrote:
In a study of the effect of pollution from underwater oil rigs on the fish population in the rigs' vicinity, researchers
compared fish caught in areas near oil rigs with those caught in areas more than a hundred miles away from any
oil rig. Finding no differences in the health of the fish in the two catches, the researchers concluded that pollution
from oil rigs poses no serious health hazard to the fish population in the rigs' vicinity.

Which one of the following, if true, most seriously weakens the researchers' argument?

A. Only a radius of ten miles around oil rigs was considered for the study
B. The fish ecosystems in the two areas sampled were not similar; one area was cold and overcast while the other
was hot and sunny.
C. Pollution from oil rigs affects the mating, and therefore, egg-laying behaviour of fish
D. Only a small number of oil rigs are present underwater.
E. The research did not include the long-term of pollution on plants on which the fish survive.

Source: Experts Global


The main aim of the study is to determine the affect on the population of fishes, they conducted only the test on the health of the fish and deduced that the population is not affected in order to weaken the conclusion Option C provides valid explanation that the mating is affected which leads to reduced population.




Well the conclusion is related to health hazards of oil rigs. It has nothing to do with the population. As per option C, we can not say anything about the health of fishes. Hence I suppose E to be the answer. C is a shell answer


Its not related in any way to the health hazards, as the statement says scientists want to know the effect of pollution on fish population so they conduct only health examination and deduce that there is no effect on fish population, but to weaken that there must be something else which affects fish population, which is caused by oil pollution and which was not studied by scientists. Option C is the Answer
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Re: In a study of the effect of pollution from underwater oil rigs on the  [#permalink]

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New post 04 Jul 2018, 02:22
A. Only a radius of ten miles around oil rigs was considered for the study
- if no health hazard was found within that radius, then how is it possible that going further pollution effects would be present. Eliminate.

B. The fish ecosystems in the two areas sampled were not similar; one area was cold and overcast while the other was hot and sunny.
- how does the temperature affects the argument. Eliminate.

C. Pollution from oil rigs affects the mating, and therefore, egg-laying behaviour of fish
- okay. Till now we were considering health of the fish population. Thus option treks us that the health is not affected. Only meeting and egg laying behaviour is affected. Hence, the argument seems to be weakened.

D. Only a small number of oil rigs are present underwater.
- so what ?? Irrelevant.

E. The research did not include the long-term of pollution on plants on which the fish survive.
- if this were true, then the health of the fish has surely been affected. But, the argument does not say so. It says that according to research the health has not been affected. Thus, though it is a weakener but we cannot disobey the premises. Premises are always true. Hence, eliminate.

Thus, choice C is the best.

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Re: In a study of the effect of pollution from underwater oil rigs on the &nbs [#permalink] 04 Jul 2018, 02:22
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