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The cause of the peculiar columnar growth pattern displayed

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The cause of the peculiar columnar growth pattern displayed [#permalink] New post 06 May 2010, 07:01
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A
B
C
D
E

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(N/A)

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43% (03:16) correct 57% (02:34) wrong based on 6 sessions
The cause of the peculiar columnar growth pattern displayed by junipers growing near burning underground veins of lignite coal has never been convincingly explained. Until recently, the accepted theory posited that the abundance of carbon monoxide in the local atmosphere caused the columnar growth. However, a new theory holds that the cause is the persistent heat present near these underground fires which, while not intense enough to inflame the trees, can nonetheless change their normal growth pattern.

The existence of which of the following would provide the strongest support for the new theory?

A. A columnar juniper growing in an atmosphere of intense heat and an absence of carbon monoxide.
B. A normal juniper growing in an atmosphere of intense heat and an absence of carbon monoxide.
C. A columnar juniper growing in an atmosphere of normal heat and a high concentration of carbon monoxide.
D. A normal juniper growing in an atmosphere of intense heat and a high concentration of carbon monoxide.
E. A columnar juniper growing in an atmosphere of intense heat and a high concentration of carbon monoxide.
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Re: Juniper growth pattern [#permalink] New post 06 May 2010, 10:03
i was quite confused between A and B.

finally selected (A). what is the OA?
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Re: Juniper growth pattern [#permalink] New post 06 May 2010, 10:09
Has to be "A".

A. A columnar juniper growing in an atmosphere of intense heat and an absence of carbon monoxide. Best answer. Shows that the columns can grow without the cm, but with heat.
B. A normal juniper growing in an atmosphere of intense heat and an absence of carbon monoxide. If anything, this weakens the theory as the intense heat didn't change the structure.
C. A columnar juniper growing in an atmosphere of normal heat and a high concentration of carbon monoxide. Weakens
D. A normal juniper growing in an atmosphere of intense heat and a high concentration of carbon monoxide. Same as B
E. A columnar juniper growing in an atmosphere of intense heat and a high concentration of carbon monoxide.Doesn't support either theory as the structure could have been changed by either the heat or cm
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Re: Juniper growth pattern [#permalink] New post 06 May 2010, 13:13
Definately "A"
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Re: Juniper growth pattern [#permalink] New post 08 Jun 2010, 04:45
OA is A.
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Re: Juniper growth pattern [#permalink] New post 08 Jun 2010, 05:00
nice
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Re: Juniper growth pattern   [#permalink] 08 Jun 2010, 05:00
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