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One of the more reliable methods of determining regional

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One of the more reliable methods of determining regional [#permalink] New post 29 Jan 2006, 10:34
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One of the more reliable methods of determining regional climatic conditions in prehistoric periods is to examine plant pollen trapped in glacial ice during ancient times. By comparing such pollen samples with spores taken from modern vegetation, scientists can figure out approximately what the weather was like at the time of pollen deposition. Furthermore, by submitting the prehistoric samples to radiocarbon dating techniques, we can also determine when certain climatic conditions were prevalent in that portion of the globe.

Which one of the following may be inferred from the information in the passage?

(A) The earth has undergone several glacial periods.
(B) Radiocarbon dating can be corroborated by glacial evidence.
(C) Similarities between prehistoric and contemporary climates do not exist.
(D) Pollen deposition is a fairly continuous process.
(E) Certain flora are reliably associated with particular climatic conditions
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 [#permalink] New post 29 Jan 2006, 10:45
Is it E?

If they can derive the climate conditions from the pollen trapped in Finland by comparing with the pollen from Antartica, at least it must be true that the pollen are associated with that climate.
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 [#permalink] New post 29 Jan 2006, 11:05
E is best, agree with you
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 [#permalink] New post 29 Jan 2006, 12:17
D looks good to me..
If pollen disposition is not a continuous process and say it happens only in autumn then how would scientists determine about the other weather conditions.
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 [#permalink] New post 29 Jan 2006, 19:27
'D'

agree with Andy
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 [#permalink] New post 29 Jan 2006, 20:43
I'm going with (E), since the whole discussion is irrelevant if (E) is not true. (D) has validity, but I believe that it requires reading into the question too much.

I choose (E).
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 [#permalink] New post 29 Jan 2006, 22:00
andy_gr8 wrote:
D looks good to me..
If pollen disposition is not a continuous process and say it happens only in autumn then how would scientists determine about the other weather conditions.


same reasoning, D.
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 [#permalink] New post 29 Jan 2006, 22:48
This is one of those tough CRs,

The OA is "E"
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 [#permalink] New post 30 Jan 2006, 05:21
D distorts the evidence in the passage. Regardless of whether or not pollen distribution is a continuous process, it is the "density" of the pollen trapped at the time which gives researchers a solid basis of comparison.

(E) is best because it is a logical statement backed up by the passage. Clearly, only the hardiest and most resilient plants could survive during a global ice age. Can`t imagine palm trees flourishing 14,000 years ago.

Great CR Vivek. Source?
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 [#permalink] New post 30 Jan 2006, 11:22
Picked E.
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 [#permalink] New post 30 Jan 2006, 17:23
GMATT73 wrote:
Great CR Vivek. Source?


Matt,

This is from 1000CRs. :-D
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 [#permalink] New post 01 Feb 2006, 12:51
picked D , should have read more carefully.. nice one Vivek!
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 [#permalink] New post 02 Jun 2006, 18:49
How do you know what Flora is? Thats why i was confused about this question..

can we assume flora is a type of plant?
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 [#permalink] New post 02 Jun 2006, 19:46
willget800 wrote:
How do you know what Flora is? Thats why i was confused about this question..

can we assume flora is a type of plant?




flora
Plants considered as a group, especially the plants of a particular country, region, or time.

This is the dictionary meaning of flora.
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 [#permalink] New post 08 Jun 2006, 02:05
Will go with E.

Close call between D and E but there is no mention of the pollen formation process.
The author mentions that pollen trapped in galcial ice can be used to know the climatic conditions. If pollen was a continous process how will you determine which climate it is denoting.
Whereas specific plants give out pollen in certain climatic conditions.
  [#permalink] 08 Jun 2006, 02:05
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