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According to scientists at the University of California, the [#permalink]
 21 Feb 2005, 19:36
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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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(E) ...............descendant from..........
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pattern is singular, so it requires singluar 'indicates'
We're left with D and E.
Descendent from seems to be the correct idiom. So I'll go with E
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A, B, C have S-V error verb indicate does not agree with the subject pattern in number
E) descendant from X is wrong. If it said descended from X it would have been right
D) correct use of idiom descendant of
D it is
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I prefer D.
Narrowed it to D and E for reasons already cited.
Cant really rule out D as descendant of is also a valid idiom?. I checked bartleby after I picked D:
SYLLABICATION: de·scen·dant
PRONUNCIATION: d-sndnt
NOUN: 1. A person, animal, or plant whose descent can be traced to a particular individual or group. 2. Something derived from a prototype or earlier form: Today's bicycles are descendants of the earlier velocipede. 3. In astrology, the point of the ecliptic or the sign of the zodiac that sets in the west at the time of a person's birth or other event.
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OA is D
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I dont like to give answer choices in favour of Idioms  . However, I got it wrong.
Here ,I got something interesting from webster site.
Avoid confusing the sense of possibility in may with the implication of might, that a hypothetical situation has not in fact occurred. For instance, let's say there's been a helicopter crash at the airport. In his initial report, before all the facts are gathered, a newscaster could say that the pilot " may have been injured." After we discover that the pilot is in fact all right, the newscaster can now say that the pilot " might have been injured" because it is a hypothetical situation that has not occurred. Another example: a body had been identified after much work by a detective. It was reported that "without this painstaking work, the body may have remained unidentified." Since the body was, in fact, identified, might is clearly called for.
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good one I fell for that may/might trap. Completely over looked idiomatic usage 
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Oh yeah it's D it's D it's D 
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swath20 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 Its between D & E descendant of Vs Descendant from Descendant from INCORRECT Descended from CORRECT
He was descended from a roayl family Correct
He is descendant of a roayl family CorrectD is correct here.
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