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# Fossils of the arm of a sloth found in Puerto Rico in 1991,

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20 Aug 2010, 13:40
A seems to have a problem with commas. It is really correct to use a comma before "and".
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21 Aug 2010, 04:22
I kinda had a heart attack when I saw so many C's.
IMO D.
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21 Aug 2010, 04:28
bmillan01 wrote:
This question can be found in the GMAT Review, 12th Edition. It is question number 78, and can be found on pages 672 and 724, the latter containing the OA. The correct answer is D.

Thanks for confirming that. My pick is D.
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29 Mar 2011, 08:35
Easy issue with E - which w/o coma in front of that word - WRONG
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29 Mar 2011, 10:16
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Let us first clear up a few things. This is not a test of the usage of ‘which’ or ‘that’. GMAT doesn’t test that aspect any more as it would not like to indulge in this controversial usage.

This is a clearly test of SV agreement, tense and idiom. What is the verb and what is its subject? Made is the verb and what made it the earliest mammals? The fossils made it (it stands for the sloth) because only fossils are dated and not any other thing. So the subject is the plural fossils and let us find the matching verb with a proper number and tense.

A. Sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of …. ‘Made it’ is wrong tense to use for something that was initiated in the past, and which remains even today so. The right tense should be the present perfect ‘have made’. Mammals of is unidiomatic

B. sloth that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on … Fossils …. Has been dated – S-V mis - match.

C. sloth that was found in Puerto Rico in 1991 was dated at 34 million years old, making this the earliest known mammal of …… Fossils … was dated –S-V mis-match and use of past tense which is wrong.

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on……. Correct number agreement, proper tense usage and right idiom – the perfect choice

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of….. Fossils was dated SV mis - match , wrong tense and wrong idiom
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29 Mar 2011, 10:58
+1 D

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23 Jul 2011, 21:13
daagh wrote:
Let us first clear up a few things. This is not a test of the usage of ‘which’ or ‘that’. GMAT doesn’t test that aspect any more as it would not like to indulge in this controversial usage.

This is a clearly test of SV agreement, tense and idiom. What is the verb and what is its subject? Made is the verb and what made it the earliest mammals? The fossils made it (it stands for the sloth) because only fossils are dated and not any other thing. So the subject is the plural fossils and let us find the matching verb with a proper number and tense.

A. Sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of …. ‘Made it’ is wrong tense to use for something that was initiated in the past, and which remains even today so. The right tense should be the present perfect ‘have made’. Mammals of is unidiomatic

B. sloth that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on … Fossils …. Has been dated – S-V mis - match.

C. sloth that was found in Puerto Rico in 1991 was dated at 34 million years old, making this the earliest known mammal of …… Fossils … was dated –S-V mis-match and use of past tense which is wrong.

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on……. Correct number agreement, proper tense usage and right idiom – the perfect choice

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of….. Fossils was dated SV mis - match , wrong tense and wrong idiom

i understand it is D. .. but can you or some one give an explanation on the tense... you have mentioned 'incorrect tense'.. 'proper tense'.. without any explanation of why & what type of tense is required here, will some explain it with a timeline, how present perfect is correct here.
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03 Sep 2011, 04:37
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
- the sentence is correct on the subject - verb agreement front. however, 'it' is ambiguous here in that sloth is not the subject of the sentence. it is object of the preposition. though it CAN act as an antecedent, a choice that replaces the pronoun with the sloth would be better.
B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
- subject and verb do not agree. The subject is fossils, verb has is incorrect. also, this choice is wordy.

C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of - subject verb agreement. Fossils was is incorrect. also, this pronoun cannot be used as a noun. it can be used as an adjective only. the correct use would be making it or making this sloth.

D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on - this choice is correct, subject and verb agree. and the sloth is introduced in place of the pronoun.

E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of - subject verb agreement issue, was dated is incorrect. introducing the sloth in place of the pronoun removes pronoun ambiguity though.
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10 Sep 2011, 00:24
D it is ..Was wondering when I saw too many C's..
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12 Sep 2011, 15:51
I picked D.

Option E troubles me because of meaning..."mammal of" means that the sloth was only found in the Greater Antilles islands.
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12 Sep 2011, 23:26
It should be D although it is wordy etc. because of correct use of S-V number agreement!
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18 Sep 2011, 23:40
'was dated' is absurd. It still is dated at 34 million years old. So use of past tense is wrong.Continuous tense has to be used here.

Fossils are plural so 'has been dated is out' have been dated will be correct.

So between A & D.

A is passive. Confuses whether the sloth or the fossil was found in 1991. hence eliminate.

Left with D . Correct answer.
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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07 Apr 2012, 05:38
IMO D......

E is wrong because it uses singlar verb "was"
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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05 Jan 2014, 09:26
tenaman10 wrote:
Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Another complex SC problem...

A) "and is superfluous, "it" is ambiguous (does it refer to the sloth or the fossils?). A is gone
B) "they" is ambiguous, who is it refering to? "has been" is incorrect, subject (fossils) and verb (has been dated) do not agree. B gone
C) "was dated" is wrong so we do not have s-v agreement. "this" at the end makes no sense since it is ambiguous as to what it refers to. C is gone
D) have been dated is correct, "making the sloth" removes any ambiguity we might have if we instead used a pronoun.
E) was dated does not give us correct s-v agreement.

D is correct
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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05 Apr 2014, 14:58
Another quick way / split method:

a) Eliminate A, C and E because "... the earliest mammal of the Greater Antilles islands" is incorrect. It should be the "... mammal on the... XX islands"

b) Between B and D, difference lies in the singular/plural choice of "Fossils". Since "Fossils" is plural, we will require "have been dated" instead of "has been dated". B also have the problem of ambiguity with "they" with no Antecedent. B therefore can be eliminated, leaving "E" the only best choice in the 5 given options.

If I could rewrite the sentence, I probably will try to eliminate the 2 commas in option D (which made it a little nervous choosing it, but is the only correct answer by POE)

Hope this helps.

Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.
A. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
B. sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
C. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
D. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
E. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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08 May 2014, 11:43
Can someone please explain why "WAS dated" is wrong. Wasn't the fossil dated in the past? - Referring to choice E.
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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19 May 2014, 09:54
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russ9 wrote:
Can someone please explain why "WAS dated" is wrong. Wasn't the fossil dated in the past? - Referring to choice E.

Hi russ9,

Let’s first understand the usage of the two tenses.

The simple past tense is used to represent an event/action that happened in the past and has no effect in the present time.

The present perfect tense is used to represent an event/action that started at some point of time in the past and
1. either has continued till now
2. or ended in the past but its effect is still visible in the present.

Now, in the given sentence what is the result or effect of the fact that the fossils have been dated/was dated at 34 million years old.

Effect: It makes the sloth the earliest known mammal on the Greater Antilles islands.

Is this effect still visible in the present?
Yes, so the present perfect tense is correctly used here.

If we consider the simple past tense as the correct answer in this option then the effect won’t be visible in the present. In that case the meaning of the sentence becomes that when these fossils were dated at 34 million years old, at that point of the time the sloth was the earliest known mammal on the Greater Antilles islands.

Let’s understand this with one more official question. I have taken this question from OG-13 with the correct option.

• Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid
• have been dated at 3.47 billion years old
• and thus are evidence of the earliest known asteroid impact on Earth.

In this case the present perfect tense (have been dated) is used because its effect (and thus are evidence of…..) is visible in the present.

Hope this helps!
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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22 May 2014, 10:36
I dont know where to post my question so im posting it here. Can someone please answer this?

"One of the villages that were attacked between Tuesday and early Wednesday lies near the town of Chibok, where more than 300 schoolgirls were kidnapped last month."

Is should it be "One of the villages that were" or "One of the villages that was" in the sentence above?

Any help would be appreciated.

Thanks
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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22 May 2014, 12:18
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havoc7860 wrote:
I dont know where to post my question so im posting it here. Can someone please answer this?

"One of the villages that were attacked between Tuesday and early Wednesday lies near the town of Chibok, where more than 300 schoolgirls were kidnapped last month."

Is should it be "One of the villages that were" or "One of the villages that was" in the sentence above?

Any help would be appreciated.

Thanks

One of <always plural noun> that/which <plural verb>

That modifies the noun immediately preceding it, so here 'that' modifies 'villages' . Correct form is 'One of the villages that were...' .
This is widely tested in GMAT, so better learn it .

Another closest relative...
One of the Villages was ... [mark no Which/That]

Structure -

One of <always plural noun> <singular verb>
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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991, [#permalink]

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22 May 2014, 14:32
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havoc7860 wrote:
I dont know where to post my question so im posting it here. Can someone please answer this?

"One of the villages that were attacked between Tuesday and early Wednesday lies near the town of Chibok, where more than 300 schoolgirls were kidnapped last month."

Is should it be "One of the villages that were" or "One of the villages that was" in the sentence above?

Any help would be appreciated.

Thanks

One of <always plural noun> that/which <plural verb>

That modifies the noun immediately preceding it, so here 'that' modifies 'villages' . Correct form is 'One of the villages that were...' .
This is widely tested in GMAT, so better learn it .

Another closest relative...
One of the Villages was ... [mark no Which/That]

Structure -

One of <always plural noun> <singular verb>

well

the rule is, in most of the cases, that /who and not which, this is generale.

Morover, there are a couple of case in which one of >>> plural noun >> singular verb is not always true. it dpeneds on the context of the phrase. In this scenario the gmat is unbeatable

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Re: Fossils of the arm of a sloth found in Puerto Rico in 1991,   [#permalink] 22 May 2014, 14:32

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