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# Which of the following best completes the passage below?

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Director
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Which of the following best completes the passage below? [#permalink]

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07 Nov 2005, 19:58
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Which of the following best completes the passage below?
Monarch butterflies, whose average life span is nine months, migrate from the midwestern United States to selected forests outside Mexico City. It takes at least three generations of monarchs to make the journey, so the great-great-grandchildren who finally arrive in the Mexican forests have never been there before. Yet they return to the same trees their forebears left. Scientists theorize that monarchs, like homing pigeons, map their routes according to the earthâ€™s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of â€œbutterfly treesâ€
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Director
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07 Nov 2005, 21:15
vc where do u get all these questions from.
My answer would be D. whts OA
Senior Manager
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07 Nov 2005, 21:27
B for me ! That is only certain amongst the ans choices.
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08 Nov 2005, 12:14
I got B.

simply because [b]low-voltage transmitter inside one grove of â€œbutterfly treesâ€
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Manager
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08 Nov 2005, 12:19
Man...this was amazingly tough...B for me..
Manager
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Re: CR # Monarch butterflies [#permalink]

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08 Nov 2005, 12:44
Very though. All other choices are out of scope except B and C. I would choose C. The low-voltage transmitter emits low voltage electricity. I would choose it also because of the contrast positively or negatively which mirrors the attracted and repelled in the passage.

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08 Nov 2005, 13:24
B.

Except for this we cannot get anything else.
Director
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09 Nov 2005, 02:44
The OA is 'B'.

Why can't it be D?
Can someone explain.?
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09 Nov 2005, 08:50
vc019 wrote:
The OA is 'B'.

Why can't it be D?
Can someone explain.?

it is not D because low-voltage transmitter does not create electro-magnetic field. It creates electricity.

D is inferring too much.
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Director
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09 Nov 2005, 13:13
Scientists are just testing, as a first step, what the response to the transmiter is.
09 Nov 2005, 13:13
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