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Scientists believe that unlike the males of most species of

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Scientists believe that unlike the males of most species of [#permalink] New post 18 Oct 2010, 01:04
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Scientists believe that unlike the males of most species of moth, the male whistling moths of Numbing, Australia, call female moths to them by the use of acoustical signals, but not olfactory ones, and they attract their mates during the day, rather than at night.

a) by the use of acoustical signals, but not olfactory ones, and they attract
b) by the use of acoustical signals instead of using olfactory ones, and attracting
c) by using acoustical signals, not using olfactory ones, and by attracting
d) using acoustical signals, rather than olfactory ones, and attract
e) using acoustical signals, but not olfactory ones, and attracting
[Reveal] Spoiler: OA

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Re: whistling moths [#permalink] New post 18 Oct 2010, 05:28
A clear parallelism question.
1. whistling = using
2. rather than
A. "by the use" - incorrect.
B. same as A.
C. by using sounds wrong.
Only D & E have "using". D is correct because it uses the idiom rather than (the same one that appears in the end of the sentence).
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Re: whistling moths [#permalink] New post 18 Oct 2010, 05:36
Pkit wrote:
Scientists believe that unlike the males of most species of moth, the male whistling moths of Numbing, Australia, call female moths to them by the use of acoustical signals, but not olfactory ones, and they attract their mates during the day, rather than at night.

a) by the use of acoustical signals, but not olfactory ones, and they attract
b) by the use of acoustical signals instead of using olfactory ones, and attracting
c) by using acoustical signals, not using olfactory ones, and by attracting
d) using acoustical signals, rather than olfactory ones, and attract
e) using acoustical signals, but not olfactory ones, and attracting

I will go for E.
A is incorrect as there is pronoun ambiguity "they" Moreover, there is no need to use "by"
B is oncorrect because of faulty parallelism
C is out for parallelism
D is out for the same reason.
E is correct. Maintains correct parallelism Moreover, you also have to ensure that the original meaning of the sentence is retained in the correct answer choice. "Instead" and "rather" are not the correct words in this context as both of them have a different meaning than "but". Also, the use of "by" is unnecessary as it makes the sentence more wordier.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 05:40
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shekharvineet wrote:
C is out for parallelism
D is out for the same reason.
E is correct. Maintains correct parallelism Moreover, you also have to ensure that the original meaning of the sentence is retained in the correct answer choice. "Instead" and "rather" are not the correct words in this context as both of them have a different meaning than "but". Also, the use of "by" is unnecessary as it makes the sentence more wordier.


I will demosntrate you that D is quite a parallel.
D is not right because of rather than, but ....
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Re: whistling moths [#permalink] New post 18 Oct 2010, 05:41
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The core of the issue is parallelism; - call female moths - and -attract their mates - are the two functions that the male moths do and both of them should be parallel. The present participial -attracting -is wrong wherever it appears. The intrusion of a subject pronoun - they - is unnecessary in A and is a redundant use, in cases in which the subjects of both parts of the sentences remain the same

D is the answer
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Re: whistling moths [#permalink] New post 18 Oct 2010, 06:02
Pkit wrote:
shekharvineet wrote:
C is out for parallelism
D is out for the same reason.
E is correct. Maintains correct parallelism Moreover, you also have to ensure that the original meaning of the sentence is retained in the correct answer choice. "Instead" and "rather" are not the correct words in this context as both of them have a different meaning than "but". Also, the use of "by" is unnecessary as it makes the sentence more wordier.


I will demosntrate you that D is quite a parallel.
D is not right because of rather than, but ....

And I did mention the use of "rather" is incorrect. Read the last three lines of my explanation. The reason I didnt mention it in the earlier part is to avoid repetiton. But good you pointed it out that it uses two connecting words instead of one.. I have a habit of pointing out the major errors in the footnotes.
What is the OA? i must admit it's a good question.
+1 to you.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 06:41
shekharvineet wrote:
And I did mention the use of "rather" is incorrect. Read the last three lines of my explanation. The reason I didnt mention it in the earlier part is to avoid repetiton. But good you pointed it out that it uses two connecting words instead of one.. I have a habit of pointing out the major errors in the footnotes.
What is the OA? i must admit it's a good question.
+1 to you.


Sorry mate, if I have offended you in some way, it was not my intention. My second statement was adressed to rav79 as he said:
Quote:
D is correct because it uses the idiom rather than (the same one that appears in the end of the sentence).


Yes, daagh is right. call female moths - and -attract their mates - are the two functions that the male moths do and both of them should be parallel.

daagh - great explanations.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 06:47
No Pkit, not at all. Infact I really liked this question for which I gave a kudo. You and daagh are doing a great service to this forum by posting challenging questions. I don't know about others but I an certainly benefitting from your efforts as it is significantly strengthening my SC.
Keep up the good work Pkit.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 07:00
shekharvineet wrote:
whats the OA?


It is D.
Press reveal,which is under the question, to see the OA.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 21:26
D

Besides grammatical reasons.

Male Moths call female moths (by) using acoustic signal (ok)
Male Moths call female moths (by) attracting during the day (very awkward)
Male Moths call female moths (by) using acoustic signal............ and attract during the day (ok)

I understand how one can be tempted to choose E, but if you consider the passage's meaning and words, then it becomes a little clearer.
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Re: whistling moths [#permalink] New post 18 Oct 2010, 22:00
shekharvineet wrote:
No Pkit, not at all. Infact I really liked this question for which I gave a kudo. You and daagh are doing a great service to this forum by posting challenging questions. I don't know about others but I an certainly benefitting from your efforts as it is significantly strengthening my SC.
Keep up the good work Pkit.


thank you, shekharvineet :)

You may find a lot of SC questions of difficult levels and different concepts using search engine.
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Re: Scientists believe that unlike the males of most species of [#permalink] New post 03 Apr 2014, 06:20
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Re: Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 10:07
I am totally confused about the answer. Because If I choose D as answer I have to agree with ' The male ..... call female moths to them using acoustical signals'. The issue is here - how do they call? If we use this option 'using' is modifying female moths and this is not the intended meaning.

In A, the problem I mentioned in D was corrected but again "they" is not clear here. So the two contenders for right answer in this question have problem. Am I correct?

Others are not correct for breaking the parallelism.

I need expert help.
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Re: Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 11:07
Raihanuddin wrote:
I am totally confused about the answer. Because If I choose D as answer I have to agree with ' The male ..... call female moths to them using acoustical signals'. The issue is here - how do they call? If we use this option 'using' is modifying female moths and this is not the intended meaning.

In A, the problem I mentioned in D was corrected but again "they" is not clear here. So the two contenders for right answer in this question have problem. Am I correct?

Others are not correct for breaking the parallelism.

I need expert help.


Hello Raihanuddin.

In this sentence, "using" is not a verb-ing modifier form that modifies a preceding noun. "using" modifies verb "call", not noun "them. This case is irregular, so we have to remember.

The rule is: by the use of = by means of = using

"using" is the short form of "by the use of".

You can say:
A do B by the use of C
A do B by means of C
A do B using C

Hope it clears your doubt.
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Re: Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 11:16
pqhai wrote:
Raihanuddin wrote:
I am totally confused about the answer. Because If I choose D as answer I have to agree with ' The male ..... call female moths to them using acoustical signals'. The issue is here - how do they call? If we use this option 'using' is modifying female moths and this is not the intended meaning.

In A, the problem I mentioned in D was corrected but again "they" is not clear here. So the two contenders for right answer in this question have problem. Am I correct?

Others are not correct for breaking the parallelism.

I need expert help.


Hello Raihanuddin.

In this sentence, "using" is not a verb-ing modifier form that modifies a preceding noun. "using" modifies verb "call", not noun "them. This case is irregular, so we have to remember.

The rule is: by the use of = by means of = using

"using" is the short form of "by the use of".

You can say:
A do B by the use of C
A do B by means of C
A do B using C

Hope it clears your doubt.


Ok.
Now if I say, Joe killed the snake using the stick. What does it mean then? I don't think it is correct.
Can we say here "Joe killed the snake by the use of stick.' We can't. So how will I understand that using is not modifying noun here?
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Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 11:40
Raihanuddin

Good point. Generally, "by using", "by the use of", or "using" are the same in terms of meaning. If you refer to an action (verb), you can omit "by", if the meaning of the sentence remains clear. The point is that you should pick an option using meaning rather than grammars only.

For example: I opened the door using a handle. "using" does not modify "door" cause "door" CAN'T use a handle.

Back to you example: Joe killed the snake using the stick. "using" is acceptable even when you omit "by" (by using) because the meaning remains clear. In addition, the snake can't use the stick, so "using" CAN'T modify "the snake". Thus, you definitely can write "using" instead of "by using".
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Re: Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 11:54
pqhai wrote:
Raihanuddin

Good point. Generally, "by using", "by the use of", or "using" are the same in terms of meaning. If you refer to an action (verb), you can omit "by", if the meaning of the sentence remains clear. The point is that you should pick an option using meaning rather than grammars only.

For example: I opened the door using a handle. "using" does not modify "door" cause "door" CAN'T use a handle.

Back to you example: Joe killed the snake using the stick. "using" is acceptable even when you omit "by" (by using) because the meaning remains clear. In addition, the snake can't use the stick, so "using" CAN'T modify "the snake". Thus, you definitely can write "using" instead of "by using".



Oh!!!!!!!

I am in big problem if I accept what you are saying.
As the mentioned sentence is wrong according to e-gmat.
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Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 12:11
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No, I would say e-gmat is 100% correct. If your example comes from e-gmat, I will say I'm wrong. My suggestion is you should follow reliable instructors, e-gmat is one of the most reliable instructors I've ever known.

First step, you should master the materials provided by your instructors. Next, you will tackle some "irregular" questions. Do not fall in "irregular" questions too soon if you haven't mastered your own materials (I do not mean you haven't mastered GMAT materials, I just give you an idea how to proceed). The odds of facing irregular questions is small.

The question we've just discussed is OG question, so it's absolutely correct. GMAT has its own rules, we have to follow.

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Re: Scientists believe that unlike the males of most species of [#permalink] New post 12 Sep 2014, 12:20
pqhai wrote:
No, I would say e-gmat is 100% correct. If your example comes from e-gmat, I will say I'm wrong. My suggestion is you should follow reliable instructors, e-gmat is one of the most reliable instructors I've ever known.

First step, you should master the materials provided by your instructors. Next, you will tackle some "irregular" questions. Do not fall in "irregular" questions too soon if you haven't mastered your own materials (I do not mean you haven't mastered GMAT materials, I just give you an idea how to proceed). The odds of facing irregular questions is small.

The question we've just discussed is OG question, so it's absolutely correct. GMAT has its own rules, we have to follow.

Regards,



Yes, you are right

Now I am satisfied. Its really tough to handle this type of question and if we get these questions at the beginning, we are sure to fall in trouble.

Kudos to you for giving me your valuable time and helping me in this question.
Re: Scientists believe that unlike the males of most species of   [#permalink] 12 Sep 2014, 12:20
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