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Which of the following best completes the passage below?

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Senior Manager
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Which of the following best completes the passage below? [#permalink] New post 03 Dec 2004, 04:28
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A
B
C
D
E

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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 earth’s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly treesâ€
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 [#permalink] New post 03 Dec 2004, 04:34
Looks like "D" to me.

The basic idea to install a low-voltage transmitter inside one grove of “butterfly treesâ€
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 [#permalink] New post 03 Dec 2004, 04:35
I think it is 'D'.

The experiment that the lepidopterists are attempting is to test the theory that monrachs guide themselves thru earth's electromagnetic fields. So probably putting a low voltage transmittor will slightly disorient the earth's electromagnetic field, (trying to justfy my answer with an obscure physics funda :wink: ) and may mislead the monarchs, so they cud either by attracted or distracted towards the particular tree.
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 [#permalink] New post 03 Dec 2004, 06:31
I will go with B too.

Quote:
As a first step in testing this theory


I am guessing the first step is to prove that they are affected by electricity, subsequent steps will show if the earth's electromagnetic field is the cause.
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 [#permalink] New post 03 Dec 2004, 07:30
I would go with ‘D’.
I assume that the low-voltage trasmitter trasmits electricity and since a magnetic field gets created when electricity flows, I presume it will be similar to the earth’s electromagnetic field.
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 [#permalink] New post 03 Dec 2004, 08:41
B for me. This evidence is still not sufficient to prove D. All it does to prove that the butterfly shows certain reactions to electricity.
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 [#permalink] New post 03 Dec 2004, 22:04
OA is B.
However I had chosen C. Can someone explain what is wrong with C?
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 [#permalink] New post 09 Feb 2006, 22:49
I just came across this question myself and I too have the same question... why is C wrong? I understand why B is right, but to me it is saying the same as C.
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Re: CR - Monarch butterflies [#permalink] New post 10 Feb 2006, 14:24
B is right , because it says the first step...
D is a Trap :roll:

[quote="sonaketu"]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 earth’s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly treesâ€
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 [#permalink] New post 12 Feb 2006, 01:26
A just gave me the deepest belly laugh! D goes way too far.

Select (B) and click confirm.
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 [#permalink] New post 03 Mar 2006, 14:24
How does testing whether "monarch butterflies are sensitive to electricity" relate to the scientists' hypothesis?

Can someone explain, please?
  [#permalink] 03 Mar 2006, 14:24
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Which of the following best completes the passage below?

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