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A peculiar feature of the embryonic mammalian circulatory [#permalink]
 22 Aug 2005, 18:32
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A peculiar feature of the embryonic mammalian circulatory system is that in the area of the heart the cells adhere to one another, beating in unison and adopting specialized orientations exclusive of one another.
(A) beating in unison and adopting
(B) they beat in unison while adopting
(C) beat in unison, and adopt
(D) beating in unison yet adopting
(E) even though they beat in unison and adopt
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Re: SC: A peculiar feature of the embryonic [#permalink]
22 Aug 2005, 21:19
pjreddy_rec wrote: A peculiar feature of the embryonic mammalian circulatory system is that in the area of the heart the cells adhere to one another, beating in unison and adopting specialized orientations exclusive of one another.
(A) beating in unison and adopting
(B) they beat in unison while adopting
(C) beat in unison, and adopt
(D) beating in unison yet adopting
(E) even though they beat in unison and adopt
I'd go with C.
Parrallelism seems to be the problem here. Adhere, beating and adopting don't agree.
A is out b/c of parallelism
B: "they beat" isn't right either
C: everything is parrallel
D: implies that beating in unison somehow conflicts with adopting
E: Same, but way too wordy
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not easy but my first choice would be C 
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But look at these two phrases "in unison" and "exclusive of one another". They are kind of opposite in meanings. The "and" in C doesn't seem correct.
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Can any one reason why OA is D?
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pjreddy_rec wrote: Can any one reason why OA is D?
Glad I choose D, IMO there is a contradiction in the sentence... they adhere to each other.... yet they have different orientation
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pjreddy_rec wrote: Can any one reason why OA is D?
The participial phrase concept is being tested here. The sentence is in present tense here, and therefore the tense should be mantained throughout. Thus the answer choice should start with 'beating'. Always remember, a participial phrase will always be set off by a comma.
Thus this leaves us with answer choices A and D. Of the two, D sets up the contrast between beating in unison and adopting specialized orientations nicely. Thus D.
Notes on participles
Participles are verbs that usually end either with ing, or ed. They act as adjectives. Present participles end with ‘ing’. Present participles are frequently tested in the GMAT. Past particples end with -t, -ed, -d, -en or –n as in dealt, asked, saved, eaten or seen. A participial phrase is usually set off by commas. A participial phrase should be as close to the nouns and pronouns they modify as possible, and those nouns and pronouns should be clearly stated.
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C acc to me.... since it is parallel but D is a close call also....since 'unison, yet exclusive of each other' makes sense as well......what is the OA
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I think ranga's explanation is correct.
We use parallel structure when the materials discussed r of the same type. But here we see a contradiction b2ween 1st two things n' the third one.
Difficult question indeed. Hope I don't see suchj querstions on actual GMAT
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