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# One of the more reliable methods of determining regional

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03 Mar 2005, 05:49
I choose "D".

Here are my explanations:

(A) The earth has undergone several glacial periods.
This cannot be infered from the passage as it mainly talks about ways in which regional climatic conditions can be found.

(B) Radiocarbon dating can be corroborated by glacial evidence.
radiocarbon dating is one way to identify when such cilmatic conditions existed. Definitely not a candidate for inference.

(C) Similarities between prehistoric and contemporary climates do not exist.
This is an extreme statement and a probable one too. Not an inference.

(D) Pollen deposition is a fairly continuous process.
Now, this is a good choice, because, if you take it as an assumption and negate it, then you'll be left with a case, where pollen deposition is not a continuous process, which would have made it difficult for scientists to use pollen deposition as a reliable method to figure out the weather conditions in pre-historic times. This is the answer for me.

(E) Certain flora are reliably associated with particular climatic conditions
This is too narrow a choice. Cannot make the two methods mentioned in the passage a relaible one.

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04 Mar 2005, 09:24
OA is E)
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04 Mar 2005, 09:37
Urgh.
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05 Mar 2005, 23:02
Oops ..
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04 Nov 2005, 19:29
E.

This is a good one. Does anyone has an answer to this?
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Re: CR - Glacial Ice [#permalink]

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05 Nov 2005, 09:54
nocilis wrote:
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

Bhai> To be honest, I did pick E as my very first choice, before seeing others' choices. Here is way I reasoned: As what I learnt from Princeton review's tips, for inference question, better to stick to the facts/premise provided . Between D and E:
+For D: we can rely mostly on "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". The use of "at" here, instead of "during", doesn't suggest a continuous pollen deposition---> I eliminated D.
+For E: we can rely mostly on " 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." The bold parts support e/other, then how about the italic part Only E mentions how a certain/particular climatic condition is related to the passage.

Hik, forgive my wordy explanation Reasoning seems wordy when typed down but very prompt in one's brain
Re: CR - Glacial Ice   [#permalink] 05 Nov 2005, 09:54

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