In some species of cricket, the number of chirps per minute : GMAT Sentence Correction (SC)
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In some species of cricket, the number of chirps per minute

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In some species of cricket, the number of chirps per minute [#permalink]

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06 Nov 2011, 08:18
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In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
A. for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve.
B. for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C. in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving.
D. to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve.
E. to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving.

Pls discuss the answer.
[Reveal] Spoiler: OA
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06 Nov 2011, 09:07
In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
A. for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve.
B. for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C. in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving.
D. to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve.
E. to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving.

Pls discuss the answer.

Original sentence is incorrect becasue of use "They". "the number of chirps" is singular. Hence "it" is required.
"D" is my answer.

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06 Nov 2011, 10:08
Thanks.
I am confused between D and E.
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12 Nov 2011, 15:12
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Thanks.
I am confused between D and E.

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
A. for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve.
B. for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C. in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving.
D. to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve.
E. to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving.

Here's how to answer this question in <30 seconds.

Step 1) Read "the number of chirps used by the male TO DO SOMETHING"

Recognize that the structure is "used by the male TO DO SOMETHING" - so you skim down the first few words of each answer choice and notice only (D) and (E) have "to attract" as the first two words.

Step 2) Now that you've narrowed it down to (D) and (E), don't bother reading from the top of the sentence stem anymore.

Just continue reading through answer choice (D). So we have:
"the number of chirps used by the male TO ATTRACT X rises and falls in accordance with the surrounding temperature, and it can in fact serve..."

"it can in fact serve" - what is "it" referring to? It's referring to "number of chirps."

"And the number of chirps can in fact serve as an approximate thermometer" - that's what choice (D) suggests.

What does chocie (E) suggest?

(E): "the number of chirps used by the male TO ATTRACT females [does x], in fact possibly serving as an approximate thermometer."

Wait a minute, we have "serving as thermometer" at the end but in the beginning we have: "does x" - specifically "rises and falls"

"Rises and falls" is NOT consistent with "serving as a thermometer" - see (E) looks no good.

Let's look back at (D).
(D): "number of chirps rises and falls...and [the number of chirps] can serve as a thermometer"

Ah - that's more like it. The number of chirps rises and falls..and can serve as a thermometer. The verb tenses are more consistent here than they are in (E).

Step 3) Compare (D) and (E) and recognize that only (E) uses consistent verb tenses on both sides of the sentence. Pick (D) and move on.
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27 Nov 2013, 20:41
GMATPill wrote:
Thanks.
I am confused between D and E.

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
A. for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve.
B. for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
C. in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving.
D. to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve.
E. to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving.

Here's how to answer this question in <30 seconds.

Step 1) Read "the number of chirps used by the male TO DO SOMETHING"

Recognize that the structure is "used by the male TO DO SOMETHING" - so you skim down the first few words of each answer choice and notice only (D) and (E) have "to attract" as the first two words.

Step 2) Now that you've narrowed it down to (D) and (E), don't bother reading from the top of the sentence stem anymore.

Just continue reading through answer choice (D). So we have:
"the number of chirps used by the male TO ATTRACT X rises and falls in accordance with the surrounding temperature, and it can in fact serve..."

"it can in fact serve" - what is "it" referring to? It's referring to "number of chirps."

"And the number of chirps can in fact serve as an approximate thermometer" - that's what choice (D) suggests.

What does chocie (E) suggest?

(E): "the number of chirps used by the male TO ATTRACT females [does x], in fact possibly serving as an approximate thermometer."

Wait a minute, we have "serving as thermometer" at the end but in the beginning we have: "does x" - specifically "rises and falls"

"Rises and falls" is NOT consistent with "serving as a thermometer" - see (E) looks no good.

Let's look back at (D).
(D): "number of chirps rises and falls...and [the number of chirps] can serve as a thermometer"

Ah - that's more like it. The number of chirps rises and falls..and can serve as a thermometer. The verb tenses are more consistent here than they are in (E).

Step 3) Compare (D) and (E) and recognize that only (E) uses consistent verb tenses on both sides of the sentence. Pick (D) and move on.

Thanks for the explanation. On exam day I would have chosen E simply because it's difficult to analyse the facts u stated in under a min and also because there are a larger percentage of questions out there which have similar pronoun ambiguity and which appropriately correct the issue conventionally.
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Re: In some species of cricket, the number of chirps per minute [#permalink]

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27 Nov 2013, 21:32
To kill the confusion the correct answer is option D,Same question has been discussed in category "Pronoun" on GMF.
Guys do not forget to consider what sentence exactly mean.IT cannot refer to male, female or cricket so the best option which keeps the meaning of the sentence clear is D.
Re: In some species of cricket, the number of chirps per minute   [#permalink] 27 Nov 2013, 21:32
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