SC: Tortoise : GMAT Sentence Correction (SC)
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# SC: Tortoise

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26 Sep 2006, 15:09
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Based on the growth rates of large modern reptiles such as the Galapagos tortoise and examinations of fossils of juvenile dinosaurs, scientists estimate that the largest dinosaurs probably lived to be between 100 and 200 years old.

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as
(C) Based on the growth rates of large modern reptiles like
(D) On the basis of growth rates of large modern reptiles, like those of
(E) Based on such growth rates as those of large modern reptiles like
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Manager
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26 Sep 2006, 15:10
OA is:

B. Why is A incorrect?
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26 Sep 2006, 15:30
govinam wrote:

Based on the growth rates of large modern reptiles such as .., scientists estimate ..

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as

Scientists are not based on the growth rates. They estimate on the basis of growth rates.
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26 Sep 2006, 20:37
ah. I see. that was obvious. Can't believe I keep missing silly errors.
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27 Sep 2006, 07:38
muddypaws wrote:
govinam wrote:

Based on the growth rates of large modern reptiles such as .., scientists estimate ..

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as

Scientists are not based on the growth rates. They estimate on the basis of growth rates.

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27 Sep 2006, 17:43
muddypaws wrote:
govinam wrote:

Based on the growth rates of large modern reptiles such as .., scientists estimate ..

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as

Scientists are not based on the growth rates. They estimate on the basis of growth rates.

why don't you say "on the basis of" modifies scientists too?
why does it modify "estimate"?
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28 Sep 2006, 02:48
One more for B...
A is wrong because Scientists are not based on anything...
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28 Sep 2006, 10:44
Tough one but saying B. "Based on" isn't correct because it modifies scientists...
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29 Sep 2006, 02:42
govinam wrote:

Based on the growth rates of large modern reptiles such as the Galapagos tortoise and examinations of fossils of juvenile dinosaurs, scientists estimate that the largest dinosaurs probably lived to be between 100 and 200 years old.

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as
(C) Based on the growth rates of large modern reptiles like
(D) On the basis of growth rates of large modern reptiles, like those of
(E) Based on such growth rates as those of large modern reptiles like

"Examinations" follows and, therefore the other word "basis" should be parallel to examinations.

Based is parallel to examined, not examinations. That's Y B is correct..
Re: SC: Tortoise   [#permalink] 29 Sep 2006, 02:42
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