Naked mole rats form : GMAT Sentence Correction (SC)
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# Naked mole rats form

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08 Apr 2014, 09:37
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Difficulty:

25% (medium)

Question Stats:

64% (01:42) correct 36% (00:39) wrong based on 171 sessions

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Naked mole rats form colonies of approximately 20 animals, each of which consists of a single reproductive female and workers that defend her

A. each of which consists
B. with each of them consisting
C. each colony consisting
D. and each of them consist
E. and each colony consisting

Meaning : 1.Naked moles form colonies of 20 animals .
2.Each of the colonies consists of a female and workers .

Sentence splitting :

1. Naked mole rats form colonies of approximately 20 animals ,each of

2. Which consists of a single reproductive female and workers

3. that defend her

Error Analysis :

All S-V pair are correct ------ correct
Verb ---- sentence stating fact , so all verbs are in present tense .---correct

Here , In " each of which ..... " modifier .

" Each "is referring to colonies , and " which " is referring to " each " ------- makes perfect sense .

So , at first glance , I could not find any error in original sentence .

POE :

a. no error .
b. " them " could be referring to animals . ----wrong
c. is better than choice a .
d. S-V error , each of them --- singular subject , but "consist " ---plural verb
e. no verb for the subject " each .."

Here my question is :
Choice A as such does not have any error , but choice C is correct as it is better constructed than choice A .
According to gmat-prep explanation , " each ... " is referring to animals ,hence choice A is incorrect , but as per my understanding how an animal can contain a female and worker ?? .

Is my analysis is correct ?? .

Thanks,
Deepak
[Reveal] Spoiler: OA
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Re: Naked mole rats form [#permalink]

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08 Apr 2014, 11:32
Naked mole rats form colonies of approximately 20 animals, each of which consists of a single reproductive female and workers that defend her

A. each of which consists
B. with each of them consisting
C. each colony consisting
D. and each of them consist
E. and each colony consisting

Choice A contains meaning error.
20 animals, each of which ( 1 animal at a time )

1 animal consists of a single reproductive female and workers that defend her.
How a single animal consists of many other animals - female and workers ?

As second half is trying to modify colonies which is placed quite far from "each of which" and as meaning conveyed is also wrong, Option A is wrong.
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Re: Naked mole rats form [#permalink]

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08 Apr 2014, 12:31
Hi Piyush ,

But "each of which .." could jump over the prepositional phrase "of approximately 20 animals" as this prepositional phrase is modifying " colonies " only ,and also it does not make sense to say " each of which .. " is modifying animals .
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Re: Naked mole rats form [#permalink]

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08 Apr 2014, 12:51
deepak1990verma wrote:
Hi Piyush ,

But "each of which .." could jump over the prepositional phrase "of approximately 20 animals" as this prepositional phrase is modifying " colonies " only ,and also it does not make sense to say " each of which .. " is modifying animals .

Hi Deepak,

You should not choose such ambiguous construction if there is any better construction available in options.

Refer:
(SANAM pronoun) some of which (VERB) - is a subgroup modifier: refer page 240 MGMAT SC guide.
{many, each, either, neither, half, one }

Such modifier refers to the nearest group before comma. Therefore, in option A each of which is modifying animals; overall such construction is ambiguous.
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Re: Naked mole rats form [#permalink]

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08 Apr 2014, 23:21
deepak1990verma wrote:
Hi Piyush ,

But "each of which .." could jump over the prepositional phrase "of approximately 20 animals" as this prepositional phrase is modifying " colonies " only ,and also it does not make sense to say " each of which .. " is modifying animals .

the rule that u r trying to apply cannot be applied in this fashion .the fact is that "each of which" can grammatically refer to "animals" .now it should be noted that doing so will give us a meaning which is nonsensical and that is what we need to avoid .
always note that common sense cannot replace the grammar requirement of a sentence .
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Re: Naked mole rats form [#permalink]

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09 Apr 2014, 07:23
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deepak1990verma wrote:
Naked mole rats form colonies of approximately 20 animals, each of which consists of a single reproductive female and workers that defend her

A. each of which consists
B. with each of them consisting
C. each colony consisting
D. and each of them consist
E. and each colony consisting

Meaning : 1.Naked moles form colonies of 20 animals .
2.Each of the colonies consists of a female and workers .

Sentence splitting :

1. Naked mole rats form colonies of approximately 20 animals ,each of

2. Which consists of a single reproductive female and workers

3. that defend her

Error Analysis :

All S-V pair are correct ------ correct
Verb ---- sentence stating fact , so all verbs are in present tense .---correct

Here , In " each of which ..... " modifier .

" Each "is referring to colonies , and " which " is referring to " each " ------- makes perfect sense .

So , at first glance , I could not find any error in original sentence .

POE :

a. no error .
b. " them " could be referring to animals . ----wrong
c. is better than choice a .
d. S-V error , each of them --- singular subject , but "consist " ---plural verb
e. no verb for the subject " each .."

Here my question is :
Choice A as such does not have any error , but choice C is correct as it is better constructed than choice A .
According to gmat-prep explanation , " each ... " is referring to animals ,hence choice A is incorrect , but as per my understanding how an animal can contain a female and worker ?? .

Is my analysis is correct ?? .

Thanks,
Deepak

Hi Deepak,

Thanks for posting your doubt here.

Your analysis is correct. Also, you doubt here is very valid. The phrase "each of which" can jump over to refer to "colonies". However, there is still a room for little ambiguity in reference. Same is the case with Choices B and D. We can say that plural pronoun "them" cannot logically refer to "animals" so they must be referring to "colonies". But why to get into these ambiguous territories when we have a two choices that CLEARLY mention that colonies consist of something.

Now Choice E is certainly incorrect because Comma + And must join two Independent clauses. Hence Choice C is the clear winner here. It has the structure Noun + Noun Modifier that without any ambiguity whatsoever describes colonies.

Also go for precise and clear answer choices when you are placed with such choices.

Hope this helps.
Thanks.
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Re: Naked mole rats form [#permalink]

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09 Apr 2014, 20:00
Quote:
E gmat wrote :Now Choice E is certainly incorrect because Comma + And must join two Independent clauses.

i would request you to kindly elaborate on this . i believe that it is not always necessary for "comma + and" to join two independent clause .
for instance : she brought milk,bread,and cheese at the store (correct sentence)
the rule is that if we have an independent clause then we can join it to another independent clause with comma +and construction but not vice versa

i believe that E is wrong because of faulty parallelism ."and" would imply a parallelism .
now E says :Naked mole rats form colonies of approximately 20 animals,and each colony consisting of a single reproductive female and workers that defend her
the portion after "and" is not parallel to anything on the left of "and"
also when we have parallelism of the sort "X and Y" then there is no necessary relationship between X and Y .this is not the case here .in fact here the portion after "and" is an extension of what has been said before "and" .for putting this "extension" we need a modifier as done in option C
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Re: Naked mole rats form [#permalink]

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13 Aug 2015, 06:39
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Re: Naked mole rats form   [#permalink] 13 Aug 2015, 06:39
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