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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 03 Aug 2006, 08:06
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A
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C
D
E

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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

Jesus, these LSAT questions are darn tough!
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 [#permalink] New post 03 Aug 2006, 08:43
It seems like an E.
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 [#permalink] New post 03 Aug 2006, 08:49
I ll go with D here
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 [#permalink] New post 03 Aug 2006, 09:28
Quote:
Jesus, these LSAT questions are darn tough!


Couldnt' agree more Guru..

Is it D?


Quote:
A) The earth has undergone several glacial periods.
Not enough evidence

(B) Radiocarbon dating can be corroborated by glacial evidence.

THe passage only says that radiocarbon dating can help determine the TIME such climatic conditions existed.


(C) Similarities between prehistoric and contemporary climates do not exist.
No way..

(D) Pollen deposition is a fairly continuous process.
i am not sure about this one...

If pollen deposition were not continous then the climatic conditions would possibly have varied too much to be pinpointed accurately between pollen depositions

(E) Certain flora are reliably associated with particular climatic conditions

Not sure about this one..though it just doesnt sound right..

What's the OA
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 [#permalink] New post 03 Aug 2006, 09:33
I like E...

The passage says nothing about how flowers and weather are connected it just assumes that it's a factual claim. From that we can 'infer' E...

And yes, I think i might need to invest in one of these LSAT books for my CR's
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 [#permalink] New post 03 Aug 2006, 09:44
Must be E.

Read teh first sentence again: "reliable methods of determining regional climatic conditions in prehistoric periods is to examine plant pollen"

that is sufficient to infer E.
D seems to be a assumption.
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 [#permalink] New post 03 Aug 2006, 09:54
Agree with D.
In E think that it is not clear if these floras have existed in present and ancient times
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 [#permalink] New post 03 Aug 2006, 10:17
One more E
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 [#permalink] New post 03 Aug 2006, 13:17
E for me.
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 [#permalink] New post 03 Aug 2006, 13:50
I'm selecting D. I think that since they are able to draw conclusions by comparing ancient pollen spores taken from modern vegetation means that it doesn't matter what type of flora is being tested. Therefore, it doesn't really matter is certain flora can be associated with particular climatic conditions.

D doesn't say as much as E, but it makes more sense.
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 [#permalink] New post 03 Aug 2006, 14:07
I think its B

1. Pollen can be used to determine climatic conditions.
2. Radio carbon dating can also be used to determine climatic conditions.

Hence the results of Radio carbon dating can used to corroborate the results from trapped pollen method.
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 [#permalink] New post 03 Aug 2006, 15:26
(E) is a better answer. (D) is not true because the passage only mentions that pollen exist in present day and past but does not mention how quickly pollen grow to indicate that this is a "continuos" process.
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 [#permalink] New post 03 Aug 2006, 20:00
the OA is E.
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 [#permalink] New post 03 Aug 2006, 21:05
Will go with E.

The last line clinches the deal for E.

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.
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 [#permalink] New post 06 Aug 2006, 04:35
jaynayak wrote:
Will go with E.

The last line clinches the deal for E.

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.

I agree. Almost fell for D.
  [#permalink] 06 Aug 2006, 04:35
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