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According to scientists at the University of California, the

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According to scientists at the University of California, the [#permalink] New post 07 Apr 2013, 08:08
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

75% (01:59) correct 25% (00:52) wrong based on 8 sessions
According to scientists at the University of California, the pattern of changes that have occurred in human DNA over the millennia indicate the possibility that everyone alive today might be descended from a single female ancestor who lived in Africa sometime between 140,000 and 280,000 years ago.

(A) indicate the possibility that everyone alive today might be descended from a single female ancestor who

(B) indicate that everyone alive today might possibly be a descendant of a single female ancestor who had

(C) may indicate that everyone alive today has descended from a single female ancestor who had

(D) indicates that everyone alive today may be a descendant of a single female ancestor who

(E) indicates that everyone alive today might be a descendant from a single female ancestor who


OA is D..... If OA is D, I think the sentence must be " the pattern of changes that has ocurred ....." indicates that .....

If the non underlined portion reads "the pattern of changes that have occurred... may indicate that" ...because have & indicate are plural.

If subject is pattern and if its singular, has is correct. OA is D
If subject is changes and if its plural, have is correct. OA is C

Please clear my confusion.
[Reveal] Spoiler: OA

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Maadhu

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Re: subject verb confusion [#permalink] New post 07 Apr 2013, 12:13
maaadhu wrote:
According to scientists at the University of California, the pattern of changes that have occurred in human DNA over the millennia indicate the possibility that everyone alive today might be descended from a single female ancestor who lived in Africa sometime between 140,000 and 280,000 years ago.

(A) indicate the possibility that everyone alive today might be descended from a single female ancestor who

(B) indicate that everyone alive today might possibly be a descendant of a single female ancestor who had

(C) may indicate that everyone alive today has descended from a single female ancestor who had

(D) indicates that everyone alive today may be a descendant of a single female ancestor who

(E) indicates that everyone alive today might be a descendant from a single female ancestor who


OA is D..... If OA is D, I think the sentence must be " the pattern of changes that has ocurred ....." indicates that .....

If the non underlined portion reads "the pattern of changes that have occurred... may indicate that" ...because have & indicate are plural.

If subject is pattern and if its singular, has is correct. OA is D
If subject is changes and if its plural, have is correct. OA is C

Please clear my confusion.


IMO OA should be E. :?:
May is mainly used for permissions. However, might is used for possibility.

To answer your question.
Subject is pattern which is singluar & a noun which is acting as an adjective to describe changes. In such scenarios (where noun acts as an adjective) the noun is always singular
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Re: subject verb confusion [#permalink] New post 07 Apr 2013, 13:00
Quote:
If subject is pattern and if its singular, has is correct. OA is D


the subject is definitely "pattern"
and "pattern" is singular

the answer sud be D ----> descendant of is correct usage
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Re: subject verb confusion [#permalink] New post 07 Apr 2013, 22:43
maaadhu wrote:
If subject is pattern and if its singular, has is correct. OA is D
If subject is changes and if its plural, have is correct. OA is C

Please clear my confusion.


@maaadu:

In this question, the author uses Prepositional phrases to hide the real subject. A prepositional phrase is a group of words headed by a Preposition, e.g. for/in/to/on/from.....

Let examine the question.

"the pattern of changes that.......".
"changes that....." is prepositional phrase, not the subject.
The pattern is real subject, hence, must go with "indicates that".

"that have occurred in human DNA over the millennia" modifies changes, NOT the pattern. Because "changes" is plural, hence, it must go with "have".

I hope it helps you.
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Re: subject verb confusion   [#permalink] 07 Apr 2013, 22:43
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