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Certain pesticides can become ineffective if used repeatedly in the sa

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Certain pesticides can become ineffective if used repeatedly in the sa  [#permalink]

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Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.


(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals

(B) If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals

(C) If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place


Verbal Question of The Day: Day 57: Sentence Correction


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Spoiler: :: nytimes article
https://www.nytimes.com/1983/06/14/science/science-watch-perishable-pesticides.html

Several years ago corn farmers in the Middle West complained to the United States Department of Agriculture that certain chemically related insecticides and herbicides had become ineffective. The chemicals included insecticides used to control corn rootworm and herbicides used against nut sedge and certain grasses.

Donald D. Kaufman, a microbiologist with the Federal agency's Agricultural Research Service, has examined hundreds of soil samples and various types of pesticides, and has found that populations of known pesticide-degrading microbes are much higher in soils with a relatively long history of pesticide use than in chemical-free soils. And when he mixed chemically similar pesticides into soil samples, he found that they generally broke down faster in soils on which similar pesticides had been used in the past.

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Originally posted by perfectstranger on 01 Aug 2008, 14:40.
Last edited by Bunuel on 16 Oct 2018, 22:13, edited 2 times in total.
Renamed the topic and edited the question.
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Re: Certain pesticides can become ineffective if used repeatedly in the sa  [#permalink]

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New post 18 Jul 2017, 21:00
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I totally hate this question, and generally start cursing uncontrollably when my students miss it. But I'm cursing at the question -- NOT my students -- because I think the question is ridiculous.

But as usual: the GMAT doesn't really care what any of us think. Let's solve this SOB.

Quote:
(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

"One reason is suggested by the finding..." Seriously, GMAT? Who the hell writes like that?!

But remember our two-step technique from the SC Guide for Beginners: eliminate DEFINITE errors first, then look for meaning issues. I don't think that this muddy mess is DEFINITELY wrong. The semicolon correctly separates two independent clauses, and the comparison seems OK.

"One reason is suggested by the finding" is awkward and wordy, in my opinion. But that's just my opinion, and my opinion doesn't matter -- and no matter how awesome you are, neither does yours.

Keep (A), perhaps while holding your nose.

Quote:
(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

I'm comfortable getting rid of this one right away, because of that very first phrase: "if used repeatedly in one place" would need to be followed by "pesticides," not "one reason." (B) is out.

Quote:
(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.

(C) has the same issue as (B), plus that comparison seems a little bit off: "much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals." "Than those" would be better if it said "than in those." (C) is out.

Quote:
(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.

This isn't horrible, to be honest. Well... actually, yeah it is, but so is (A). I don't think there's a DEFINITE error in (D), but the placement of "if used repeatedly in one place" is definitely suspect: it sounds like "one reason" is the thing that is used repeatedly in the same place. You basically have to re-read the whole thing to figure out that it's the pesticides that are used in one place.

More generally, I think you could make a (not super-convincing) argument that the sentence is so horrendously wordy that you lose track of the subject. "The finding (blah blah blah....) is suggestive of one reason...." In general, please be really careful with this sort of thing. Frankly, (A) is pretty wordy, too; (D) is arguably wordy enough that the meaning become unclear. That's a judgment call, and that's really not the way you want to think about SC, but it maybe adds a little bit of support to the idea that (A) is better than (D).

If you wanted to be conservative, you could keep (D), but I think that the modifier placement issue definitely tilts us toward (A). So (D) is out.

Quote:
(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.

I actually really like the placement of "if used repeatedly in the same place" here. And I think we can make a similar (weak!) case about "wordiness" as in (D): there's a whole lot of stuff between the subject and the verb, and that makes things muddy. But again: you shouldn't be terribly convinced by arguments about "wordiness", and we should try to find something that's more solid, relating to either grammar or meaning.

And here's the big issue: "the finding of much larger populations of pesticide-degrading microbes..." We're really not talking about the "finding of microbes" -- that would refer to the act of seeing the microbes themselves. The "reason" that we're interested in is the finding that there are larger populations of microbes in some soils than in others.

And I know: that's subtle as all hell, but it definitely makes the meaning in (E) a little bit illogical. So we're left with a steaming pile of poo, otherwise known as answer choice (A).
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New post 08 Jul 2012, 09:49
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(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(B) If used repeatedly in the same place, one reason (wrong subject for the first phrase) that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(C) If used repeatedly in the same place, one reason (same as B) certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.--there are -(redundant)

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place ---(microbes comparison- Incorrect)
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New post 01 Aug 2008, 19:23
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perfectstranger wrote:
Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.


(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.->follows parallelism ,independent clauses rightly used.CORRECT
(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.-> if used ...,one reason is wrong sincer if used modifies pesticides
(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.-> if used ...,one reason is wrong sincer if used modifies pesticides
(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is
suggestive of one reasonif used repeatedly in the same place,certain pesticides can become ineffective. -> here one reason ,if used is misleading.

Please explain in a detailed way


Under the limited conditions A is the BEST but where is option (E)?
Kindly post the OA and OE and option (E)

if in A it had been one reason for the same ....is suggested ... it would have been better construction
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New post 08 Jul 2012, 09:49
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(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. --- Can not lay hands on this choice. The topic is split with a semicolon, a sensible thing to do in such cases.

(B) If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. -----The participial modifier - If used repeatedly- should modify pesticides and not one reason

(C) If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals. -----------The participial modifier - If used repeatedly- should modify pesticides and not one reason

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.----- The sentence is a run –on. The second part of the topic, going after - if used repeatedly – is dangling loosely without a connector such as that or a semicolon. Hence, wrong

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place---- As in D, a connector as –that- is essential between reason and certain.
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New post 15 Jan 2014, 11:41
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perfectstranger wrote:
Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.


(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.
(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason,if used repeatedly in the same place,certain pesticides can become ineffective.
(E) The finding of much larger populations of pesticides-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.
Please explain in a detailed way
In B/C, "If used repeatedly in the same place" directly refers to "one reason". So straight wrong.
D is run on sentence as part1 "The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason" and part 2 "if used repeatedly in the same place,certain pesticides can become ineffective" can act as independent sentences.
E needs the linkage(preferably that) between "one reason" and "certain pesticides can become ineffective if used repeatedly in the same place"
A is fine...... as it is devoid of all these modifier and connector issues.
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New post 28 Jan 2014, 07:22
Certain pesticides can become ineffective if used repeatedly in the same place; on reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

Please find below the clauses in this sentence :

Certain pesticides can become ineffective --- IC

one reason is suggestedby the finding ----IC

That there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals---IC


Now my doubt is what is 'That' modifying in this sentence. Is it modifying 'findings' or 'reason'. Logically it should modify reason because the reason for the finding is that 'there are much larger......'. Moreover the clause after semicolon is written in passive and we we turn it into active than it will read as- The finding suggests one reason that...-
. Now it is clear that 'that' is modifying reason. Is my analysis correct?


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Re: Certain pesticides can become ineffective if used repeatedly in the sa  [#permalink]

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New post 28 Jan 2014, 23:46
rahulvv wrote:
Certain pesticides can become ineffective if used repeatedly in the same place; on reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

Please find below the clauses in this sentence :

Certain pesticides can become ineffective --- IC

one reason is suggestedby the finding ----IC

That there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals---IC


Now my doubt is what is 'That' modifying in this sentence. Is it modifying 'findings' or 'reason'. Logically it should modify reason because the reason for the finding is that 'there are much larger......'. Moreover the clause after semicolon is written in passive and we we turn it into active than it will read as- The finding suggests one reason that...-
. Now it is clear that 'that' is modifying reason. Is my analysis correct?


I


A semi colon separates two independent clauses. The part before the semi colon and after the semi colon are two independent (but related) clauses.

The last part of the sentence "there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals." is the finding, not the reason. The finding suggests the reason.

Take a generic case: You notice A (A - Certain pesticides can become ineffective if used repeatedly in the same place)
You wonder why A happens. You are looking for a reason.
You notice B. B is something you find by testing. B is a finding. (B - there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals)

B suggests you the reason for A.

So 'that there are ... such chemicals' is an essential modifier of 'finding'.
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New post 30 Jan 2014, 11:46
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Hi Rahul,

Thank you for posting your doubt here. :-)

Let's break this official sentence in its clauses:

Cl. 1: Certain pesticides can become ineffective if used repeatedly in the same place; (IC)

Cl. 2: one reason is suggested by the finding (IC)

Cl. 3: that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils (DC)

Cl. 4: that are free of such chemicals. (DC)

In this sentence, "that" refers to "finding" as its give detail about what that finding is. So yes, "that" refers to "finding".

Hope this helps. :-)
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New post 31 Jan 2014, 00:15
[quote="egmat"]Hi Rahul,

Thank you for posting your doubt here. :-)

Let's break this official sentence in its clauses:

Cl. 1: Certain pesticides can become ineffective if used repeatedly in the same place; (IC)

Cl. 2: one reason is suggested by the finding (IC)

Cl. 3: that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils (DC)

Cl. 4: that are free of such chemicals. (DC)

In this sentence, "that" refers to "finding" as its give detail about what that finding is. So yes, "that" refers to "finding".


Hi Shraddha/ E-Gmat,

"Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals."

In this sentence, "that" refers to "finding" as its give detail about what that finding is. So yes, "that" refers to "finding".

Now I am bit confused that how that can modify "finding" ,1)Finding is singular subject but the verb used for that is "are" ( since that act as subject here) ,2) logically if I replace that with finding then the clause becomes "finding are free of such chemicals" and 3)how can that jump over a complete clause to modify finding.

Kindly advise me about the above , maybe my understanding of That is completely wrong.

Tks/Brgds
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New post 31 Jan 2014, 08:41
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anuragd wrote:

Hi Shraddha/ E-Gmat,

"Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals."

In this sentence, "that" refers to "finding" as its give detail about what that finding is. So yes, "that" refers to "finding".

Now I am bit confused that how that can modify "finding" ,1)Finding is singular subject but the verb used for that is "are" ( since that act as subject here) ,2) logically if I replace that with finding then the clause becomes "finding are free of such chemicals" and 3)how can that jump over a complete clause to modify finding.

Kindly advise me about the above , maybe my understanding of That is completely wrong.

Tks/Brgds
Anurag


Hi Anurag,

You ask a good question, and I am sure this question must have confused many of the test-takers. To understand what is happening in this sentence, let's begin with a very simple basic example:

My brother showed me the watch that he found near the lake that is just behind our house.

So here we have two "that". Let's talk about the second one first. It is very clear that the second "that" modifies the preceding noun entity "lake". In this usage, "that" acts a Subject for which the Verb is "is".

Now let's talk about the first "that". Here "that" is acting as a Relative Pronoun because it gives us more information about the preceding noun entity "the watch". However, "that" here is NOT the Subject of the clause that is starts. The Subject of the Dependent Clause started by "that" is "he" and the Verb for this Subject is "found". This usage is not as common on GMAT as the second usage of "that" is.

In the official sentence in question has the similar usage of "that".

Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

The "that" after "finding" refers back to "finding" only. Now study the following two examples to understand the SV pair in the DC started by this "that".

There is an apple on the table.
There are many fruits on the table.

Now, many would say that in both the sentences, "there" is the Subject. If that is so then why the first sentence uses Singular Verb "is" and the second sentence uses Plural Verb "are"? The reason for this is that the Subject in the first sentence is "an apple" - a Singular noun entity, and the Subject in the second sentence is "many fruits" - a Plural noun entity. "There" in both the sentences actually works as placeholders.

Sp again, in the official sentence, in the clause "there are much larger populations of pesticide-degrading microbes...", the Subject is Plural "much larger populations". This is the reason why the clause has the Plural Verb "are". "There" is just a placeholder here.

Hope this helps. :-)
Thanks.
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New post 12 Feb 2014, 18:31
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(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.Correct - structure of sentence is okay; comparison "in soils with a relatively long history of pesticide use" + "are much larger populations of X" "than" "in soils that are free of such chemicals"

(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.Wrong - "if" clause is frequently used with "then" clause; "one reason...is suggested...by the finding that" is redundant.

(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.Wrong - "if" clause is frequently used with "then" clause; "one reason...is suggested...by the finding that" is redundant; comparison clause of "in soils..." and "those that" is not structurally similar

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason,if used repeatedly in the same place,certain pesticides can become ineffective.Wrong - comma splice. You cannot combine two dependent clauses with a comma

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can be come ineffective if used repeatedly in the same place. comparison clause of "in soils..." and "those that" is not structurally similar; "one reason certain pesticides" must have a conjunction or the sentence is not grammatical.

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New post 08 Jan 2017, 11:17
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Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.


(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(B) If used repeatedly in the same placeone reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

pesticides are used repeatedly not any reason. Modifier error.

(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.

pesticides are used repeatedly not any reason. Modifier error. Also this implies that removal of that makes the sentence awkward.

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.

Suggestive of is not idiomatic and ambiguous
Also there is no proper conjunction between two clauses. comma does not help us get intended meaning.


(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.

finding of microbes does not make sense.
that cannot refer to those and also not refer to soils properly.
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Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.


(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.
(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.
(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.


The shortest way to tackle this horrendous topic is to eliminate some number of choices through modification. In B and C, you have an introductory modifier and what follows after comma must be certain pesticides. Hence eliminate choices B and C. The idiom suggestive of is not the correct idiom. In fact, the olden days, suggestive was used only cases of sexual connotations. Between A and E, the missing of the connector 'that' after -reason- in a reported speech is a phenomenal error in E. Therefore A.

Has OG ever repeated this topic in any further versions of OG10?

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New post 18 Jul 2017, 23:35
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Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
CORRECT

(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
Incorrect since after comma the consequence (Pesticides become ineffective) of IF Clause should come.

(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.
Incorrect since after comma the consequence (Pesticides become ineffective) of IF Clause should come. Moreover, lack of THAT after ONE REASON leads to a Fragmented sentence

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.
After removing modifiers, the sentence would be-
The finding is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.
A Run-on sentence. Hence Incorrect.

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.
After removing modifiers, the sentence would be-
The finding suggests one reason certain pesticides can become ineffective if used repeatedly in the same place,
Lack of THAT after ONE REASON leads to a Fragmented sentence. Hence Incorrect.
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New post 19 Jul 2017, 01:40
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Answer: A

Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(A) Certain pesticides can become ineffective if used repeatedly in the same place;one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. -CORRECT. ":" give the extra information that is required correctly.

(B) If used repeatedly in the same place,one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals. -The opening modifier is wrongly modifying "one reason"

(C) If used repeatedly in the same place,one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals. -The opening modifier is wrongly modifying "one reason"

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective. -The first very long sentence gives the meaning as if "the finding" if used repeatedly in the same place would make pesticides ineffective. This doesn't make any sense.

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place. -"The finding of much" is awkward. It should be "The finding that".
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New post 17 Dec 2017, 04:50
Hello mikemcgarry abhimahna

I have a doubt in this one.
The reason I eliminated D is :

The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.

Using Underlined as a dep clause and fitting it in the start of the sentence. I know pretty cheap trick. :P

For example if used repeatedly in the same place, certain pesticides can become ineffective ,The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason.

So here it doesn't even make sense and I crossed it.

Is it worth going with as a strategy?

Thankyou in advance.
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New post 18 Dec 2017, 12:38
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Prashant10692 wrote:
Hello mikemcgarry abhimahna

I have a doubt in this one.
The reason I eliminated D is :

The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.

Using Underlined as a dep clause and fitting it in the start of the sentence. I know pretty cheap trick. :P

For example if used repeatedly in the same place, certain pesticides can become ineffective ,The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason.

So here it doesn't even make sense and I crossed it.

Is it worth going with as a strategy?

Thankyou in advance.

Dear Prashant10692,

I'm happy to respond. :-)

My friend, I'm sorry to say that you misapplied this cheap trick. You misinterpreted the interpretation of the clause at the end.

The clause at the end is intended to be an appositive for the final word preceding it, "reason." If we wanted to specify a reason, this is a poor way to do it. A colon would have been better than a comma to indicate that the reason was being given.

Choice (D) has a large number of problems. The wording is awkward in a variety of ways. You are looking at individual grammar rules and you are missing the forest for the trees. My friend, it's so important to develop your intuition for English by developing a habit of reading. The rule-based approached to GMAT SC is a conveyor belt to the middle of nowhere.

Does all this make sense?
Mike :-)
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New post 16 Jan 2018, 20:36
souvik101990 wrote:

Verbal Question of The Day: Day 57: Sentence Correction


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Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.

(A) Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals

(B) If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals

(C) If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals

(D) The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective

(E) The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.


AjiteshArun ,GMATNinja ,mikemcgarry , egmat ,sayantanc2k , other experts -
In OA-A , can you please enlighten on the usage of the underlined part as below that can be reworded as - If used repeatedly in the same place, Certain pesticides can become ineffective.
Since the If part of the sentence is in simple past (used), shouldn't the then part of the sentence be in simple past or use would verb ?


Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals
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New post 17 Jan 2018, 17:22
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Skywalker18 wrote:
AjiteshArun ,GMATNinja ,mikemcgarry , egmat ,sayantanc2k , other experts -
In OA-A , can you please enlighten on the usage of the underlined part as below that can be reworded as - If used repeatedly in the same place, Certain pesticides can become ineffective.
Since the If part of the sentence is in simple past (used), shouldn't the then part of the sentence be in simple past or use would verb ?

Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals

Dear Skywalker18

I'm happy to contribute to this discussion. :-)

I see that my intelligent colleagues AjiteshArun and sayantanc2k have already responded. With all due respect to those gentlemen, I would give a slightly different reply.

Because "if" is a subordinate conjunction, this word always begins a full clause that requires a full verb. I believe the GMAT would say that "if used repeatedly" is correct only because it is understood that a simple [pronoun] + [auxiliary verb] pair has been omitted.

If [they are] used repeatedly in the same place, certain pesticides can become ineffective.

Here, we see that the verb is NOT a past tense verb at all. Instead, it's a present-tense passive verb.

Does all this make sense?
Mike :-)
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