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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 15 Oct 2008, 10:54
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A
B
C
D
E

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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
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Re: SC: ancestor [#permalink] New post 15 Oct 2008, 12:22
D.

How long does it usually take you guys to complete these SCs?
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Re: SC: ancestor [#permalink] New post 15 Oct 2008, 12:39
bigfernhead wrote:
D.

How long does it usually take you guys to complete these SCs?


easy: 30-60 sec
moderate: 1-2 min
difficult: 2-2.5 min
insane: 2-3 min (usually at this point i've narrowed to a decent guess)
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Re: SC: ancestor [#permalink] New post 15 Oct 2008, 12:40
yup, OA is D
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Re: SC: ancestor [#permalink] New post 19 Oct 2008, 00:03
bigtreezl 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


"the pattern" is singular so we need "indicates" A B and C eliminated.

"descendant of" is correct. So D
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Re: SC: ancestor [#permalink] New post 19 Oct 2008, 07:50
bigtreezl 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


pattern of is singular so "indicates" is required.

descendant of is correct as well .... IMO D)
Re: SC: ancestor   [#permalink] 19 Oct 2008, 07:50
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