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A Newly discovered disease is thought to be caused by a

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Director
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A Newly discovered disease is thought to be caused by a [#permalink] New post 04 Jul 2004, 02:58
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A
B
C
D
E

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A Newly discovered disease is thought to be caused by a bacteria. However, recently released data shows that the bacteria thrives in the presence of a certain virus, implying that it is actually the virus that causes the new disease

Which of the following evidence would support the implication above:

A WRONG
B The virus has been shown to aid the growth of bacteria, a process which often leads to the onset of the disease
C The virus alone has been observed in many cases of the disease
D WRONG
E Onset of the disease usually follows infection by both the virus and the bacteria
Director
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 [#permalink] New post 04 Jul 2004, 04:02
this is an OG question.

Answer is C. If only virus was found in many cases of the disease, then definitely Bacteria is out of question!
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Re: CR Virus/Bacteria [#permalink] New post 04 Jul 2004, 04:16
srijay007 wrote:
A Newly discovered disease is thought to be caused by a bacteria. However, recently released data shows that the bacteria thrives in the presence of a certain virus, implying that it is actually the virus that causes the new disease

Which of the following evidence would support the implication above:

A WRONG
B The virus has been shown to aid the growth of bacteria, a process which often leads to the onset of the disease
C The virus alone has been observed in many cases of the disease
D WRONG
E Onset of the disease usually follows infection by both the virus and the bacteria


B - wrong as it simply repeats what is said in the second sentence of the stem, it's not a new piece of evidence: |bacteria thrives in the presence of the virus|=|the virus aids the growth of bacteria|

C - correct:
implication in the stem - the virus causes the new disease
evidence in (C) - virus alone has been observed in cases of the disease

E - wrong
implication in the stem - the virus causes the new disease
evidence in (E) - suggests that both the virus and the bacteria play an equal role in the disease
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Director
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 [#permalink] New post 04 Jul 2004, 04:31
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that's a very good practice Smashing!

I will try to adopt the same style and put down reasons (as much as I can) even for all the incorrect choices.
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 [#permalink] New post 04 Jul 2004, 09:20
Just show evidence that the virus alone causes the disease. C.
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 [#permalink] New post 04 Jul 2004, 21:41
No doubt C.

Thanks for the explainations.
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 [#permalink] New post 05 Jul 2004, 00:06
IMO (C) is best.

SmashingGrace: Just to point out, IMO your explanation for (B) is not correct, to me (B) seems to be a weaken the Q rather than strengthen. As per (B) it is the "growth of bacteria" which is responsible for the disease and not the virus itself. Correct me if I am wrong.
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 [#permalink] New post 05 Jul 2004, 00:37
OA is C
  [#permalink] 05 Jul 2004, 00:37
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