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Good SC_GPREP

by gmat_perfect » Sun Mar 14, 2010 11:44 am
Hundreds of species of fish generate and discharge electric currents, in bursts or as steady electric fields around their bodies, using their power either to find and attack prey, to defend themselves, or also for communicating and navigating.

(A) either to find and attack prey, to defend themselves, or also for communicating and navigating
(B) either for finding and attacking prey, defend themselves, or for communication and navigation
(C) to find and attack prey, for defense, or communication and navigation
(D) for finding and attacking prey, to defend themselves, or also for communication and navigation
(E) to find and attack prey, to defend themselves, or to communicate and navigate

OA: E
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by reply2spg » Sun Mar 14, 2010 11:59 am
Parallelism E is correct. Initially I was looking for the ||ism for either.... or.... However, after very close analysis it is E.
gmat_perfect wrote:Hundreds of species of fish generate and discharge electric currents, in bursts or as steady electric fields around their bodies, using their power either to find and attack prey, to defend themselves, or also for communicating and navigating.

(A) either to find and attack prey, to defend themselves, or also for communicating and navigating - Incorrect - not parallel. either to not ||el to or also
(B) either for finding and attacking prey, defend themselves, or for communication and navigation - Incorrect - Communication and navigation are nouns, which are not ||el to verbs, finding and attacking. Also 'defend themselves' does not mdify anything.
(C) to find and attack prey, for defense, or communication and navigation - Incorrect - not ||el. Communication and navigation are nouns and not ||el with verbs find and attack. to...for... are not ||el
(D) for finding and attacking prey, to defend themselves, or also for communication and navigation - Incorrect - for...to...also are not ||el
(E) to find and attack prey, to defend themselves, or to communicate and navigate - Correct - ||el

OA: E
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by gmatmachoman » Sun Mar 14, 2010 12:00 pm
gmat_perfect wrote:Hundreds of species of fish generate and discharge electric currents, in bursts or as steady electric fields around their bodies, using their power either to find and attack prey, to defend themselves, or also for communicating and navigating.

(A) either to find and attack prey, to defend themselves, or also for communicating and navigating
(B) either for finding and attacking prey, defend themselves, or for communication and navigation
(C) to find and attack prey, for defense, or communication and navigation
(D) for finding and attacking prey, to defend themselves, or also for communication and navigation
(E) to find and attack prey, to defend themselves, or to communicate and navigate

OA: E
Its a lovely SC!!

This one tests "parallelism".(Either X,Y or Z)

(E) to find and attack prey, to defend themselves, or to communicate and navigate
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by gmat_perfect » Sun Mar 14, 2010 11:48 pm
Would any one help?

The idiom is "either XX, or YY"

In the option E, where is the "either"?

(E) to find and attack prey, to defend themselves, or to communicate and navigate.

=> "Either X, Y, or Z" is the idiom, but where is the "either"?

Thanks.
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by reply2spg » Mon Mar 15, 2010 6:54 am
You have the same confusion, what I had when I looked this question first time. Keep in mind that it is not necessary to have 'either', whenever you see 'or', vice versa. You can have 'either' alone in the sentence or 'or' alone. This sentence talks about the purpose why fish generate and discharge the currents. There are 3 possibilities 'to find and attack prey, to defend themselves, or to communicate and navigate'. There are chances that they are generating and discharging the currents for all three posibilities. However, with either...or...you have only one option and not all. Hope this helps!!!!
gmat_perfect wrote:Would any one help?

The idiom is "either XX, or YY"

In the option E, where is the "either"?

(E) to find and attack prey, to defend themselves, or to communicate and navigate.

=> "Either X, Y, or Z" is the idiom, but where is the "either"?

Thanks.
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