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# According to scientists at the University of California, the

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Intern
Joined: 09 Aug 2006
Posts: 36
According to scientists at the University of California, the [#permalink]

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14 Aug 2006, 03:20
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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

Could anyone kindly explain this one?
Manager
Joined: 28 Feb 2003
Posts: 147
Location: Kiev

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14 Aug 2006, 03:36
(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

1. pattern...indicates, therefore (D) or (E)

2. "a descendant from" vs. "a descendant of" To my mind, the correct option is the latter one (descendant - is noun).
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Re: SC 1000 - ancestor [#permalink]

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14 Aug 2006, 03:39
Beegeez2 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

Looks like (A) for multiple reasons:

1. pattern of changes....indicate ---> correct S-V agreement
2. ~the possibility that~ is idiomatic
3. ~descended from~ another correct idiom
4. past perfect "had" not needed here.
Current Student
Joined: 29 Jan 2005
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14 Aug 2006, 03:43
bono wrote:
(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

1. pattern...indicates, therefore (D) or (E) :

2. "a descendant from" vs. "a descendant of" To my mind, the correct option is the latter one (descendant - is noun).

How can everyone (plural) be a decendent of (singular)?

Last edited by GMATT73 on 14 Aug 2006, 04:49, edited 1 time in total.
Intern
Joined: 14 Aug 2006
Posts: 26

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14 Aug 2006, 03:54
Will go with D

A,B,C-- Subject verb agreement violated -- Subject is "pattern" - does not agree with verb "indicate"

E -- "descendent from" incorrect idiom -- "descendent of" correct idiom
Intern
Joined: 09 Aug 2006
Posts: 36

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14 Aug 2006, 04:16
Ha! I expect this to be controversial.

(A) indicate does not agree with the pattern; be descended from should be replaced by descend from

(B) indicate does not agree with the pattern

"Everyone," according to a dictionary, is singular.

I choose D also, but OA is E. Could anybody else shed some light on this?
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14 Aug 2006, 04:51
Director
Joined: 10 Oct 2005
Posts: 718

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14 Aug 2006, 05:11
My choice was D
Between D and E
the pattern of changes.... indicates
what is the difference between may be and mighr be in this question?
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Intern
Joined: 22 May 2006
Posts: 7

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14 Aug 2006, 07:56
I went with E on this one. The reasoning behind it is that everyone in everyone alive today is singular, so indicates must be singular as well. So, right off hand I eliminated A, B, C since they have a plural form of indicate. So, between D, and E, I chose E because I used a silly analogy of a bird hatching from an egg, a bird doesn't hatch of egg, it is ackward, so in the same principle, descendant from is correct, so I went with E.
Manager
Joined: 22 May 2006
Posts: 176

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14 Aug 2006, 08:37
Beegeez2 wrote:
Ha! I expect this to be controversial.

(A) indicate does not agree with the pattern; be descended from should be replaced by descend from

(B) indicate does not agree with the pattern

"Everyone," according to a dictionary, is singular.

I choose D also, but OA is E. Could anybody else shed some light on this?

Recheck your source. The OA is D.
VP
Joined: 15 Jul 2004
Posts: 1445
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)

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14 Aug 2006, 08:43
Picked D because pattern needs indicates for SV and "descendent of" I thought was idiomatic.
Director
Joined: 10 Oct 2005
Posts: 718

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14 Aug 2006, 09:19
http://www.gmatclub.com/phpbb/viewtopic ... california
good discussion here
And the OA is inDeed D
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14 Aug 2006, 09:19
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