It is currently 23 Oct 2017, 19:24

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Hydrocarbons, with which fruit flies perfume themselves in species-spe

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 23 May 2008
Posts: 414

Kudos [?]: 461 [3], given: 14

Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

05 Oct 2009, 05:42
3
KUDOS
25
This post was
BOOKMARKED
00:00

Difficulty:

65% (hard)

Question Stats:

60% (01:04) correct 40% (01:14) wrong based on 753 sessions

### HideShow timer Statistics

Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.

(A) and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of

(B) and apparently this assists flies when they taste the hydrocarbons on prospective mates in distinguishing their own species from those of

(C) which apparently assists flies that tastes the hydrocarbons on prospective mates in being able to distinguish their own species from

(D) apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of

(E) apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from
[Reveal] Spoiler: OA

Last edited by hazelnut on 12 Oct 2017, 19:49, edited 4 times in total.
Edited the question.

Kudos [?]: 461 [3], given: 14

Director
Joined: 01 Apr 2008
Posts: 873

Kudos [?]: 844 [1], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

05 Oct 2009, 06:03
1
KUDOS
IMO E too.

Hydrocarbons is the subject so the last part should refer to hydrocarbons rather than the "way in which fruit flies perfume". A, B and C out.

D=> "to assist" is not the intended meaning.

Kudos [?]: 844 [1], given: 18

Senior Manager
Joined: 23 May 2008
Posts: 414

Kudos [?]: 461 [0], given: 14

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

05 Oct 2009, 06:07
OA is E.....

can anyone explain me...what is the difference between THOSE OF & THAT OF
i mean when to use these options

Kudos [?]: 461 [0], given: 14

Manager
Joined: 03 Aug 2009
Posts: 85

Kudos [?]: 144 [0], given: 1

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

06 Oct 2009, 08:57
gurpreet07 wrote:
OA is E.....

can anyone explain me...what is the difference between THOSE OF & THAT OF
i mean when to use these options

"That of" is used to refer singular noun where as "those of" is used to refer plural noun. I am not sure though.
_________________

Consider kudos for good post.

Kudos [?]: 144 [0], given: 1

Manager
Status: Last few days....Have pressed the throttle
Joined: 20 Jun 2010
Posts: 67

Kudos [?]: 61 [2], given: 27

WE 1: 6 years - Consulting
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

04 Jan 2011, 04:30
2
KUDOS
noboru wrote:
Whats wrong with D?
thanks

Problem with D is "assisting flies to taste". This phrase changes the meaning of the whole sentence. The hydrocarbons assists in distinguishing the species and not assists in tasting which actually D mentions. E correctly mentions "assisting flies that taste the hydrocarbons.... in distinguishing....."
_________________

Consider giving Kudos if my post helps in some way

Kudos [?]: 61 [2], given: 27

Manager
Joined: 02 Nov 2009
Posts: 140

Kudos [?]: 204 [0], given: 97

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

05 Jul 2012, 07:50

gurpreet07 wrote:
Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.
A. and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of
B. and apparently this assists flies when they taste the hydrocarbons on prospective mates in distinguishing their own species from those of
C. which apparently assists flies that tastes the hydrocarbons on prospective mates in being able to distinguish their own species from
D. apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of
E. apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from

Kudos [?]: 204 [0], given: 97

Magoosh GMAT Instructor
Joined: 28 Nov 2011
Posts: 303

Kudos [?]: 1229 [13], given: 2

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

05 Jul 2012, 08:31
13
KUDOS
Expert's post
5
This post was
BOOKMARKED
Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of others.

A. and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own species from that of

The 'this' is ambiguous and needs a noun immediately following it so we know what 'this' refers to. Also, 'own species from that of' is confusing. What does 'that' stand for? Should simply be 'their own species from other species', or using ellipsis, 'their own species from others.'

B. and apparently this assists flies when they taste the hydrocarbons on prospective mates in distinguishing their own species from those of

Same issue as (A).

C. which apparently assists flies that tastes the hydrocarbons on prospective mates in being able to distinguish their own species from

The use of 'which' incorrectly modifies 'courtship.' Also, 'in being able to...' is wordy.

D. apparently assisting flies to taste the hydrocarbons on prospective mates to distinguish their own species from those of

The idiom is 'assisting in Verb-ing'. Here it is 'assisting...to taste.'

E. apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from

Use the correct idiom, 'assisting...in distinguishing.' Also, correctly compares species to species.

Hope that helps
_________________

Christopher Lele
Magoosh Test Prep

Kudos [?]: 1229 [13], given: 2

Manager
Joined: 12 Jan 2015
Posts: 223

Kudos [?]: 76 [0], given: 79

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

20 Mar 2016, 04:48
Hi chetan2u . daagh /

I have a doubt in A and E.

Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important
in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish
their own species from that of others[/b
].

A. and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish [b]their own species from that of others
.
E. apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from

OA- E.

First I eliinated A because of word "THIS" but in the end--> don't we need that/those..?

A. distinguish their own species from that of others. --> That = species

If we remove "that" then we are comparing ---> species (in A) and Others ...
According to me it should be-

and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own
species from species of

So, to refer back to species we need "THAT"

_________________

Thanks and Regards,
Prakhar

Kudos [?]: 76 [0], given: 79

Manager
Joined: 08 Jan 2015
Posts: 92

Kudos [?]: 22 [0], given: 654

Location: Thailand
Schools: Duke '19 (A), HKU (A)
GMAT 1: 540 Q41 V23
GMAT 2: 570 Q44 V24
GMAT 3: 550 Q44 V21
GMAT 4: 660 Q48 V33
GPA: 3.31
WE: Science (Other)
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

20 Mar 2016, 22:28
PrakharGMAT wrote:
Hi chetan2u . daagh /

I have a doubt in A and E.

Hydrocarbons, with which fruit flies perfume themselves in species-specific blends, are known to be important
in courtship, and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish
their own species from that of others[/b
].

A. and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish [b]their own species from that of others
.
E. apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from

OA- E.

First I eliinated A because of word "THIS" but in the end--> don't we need that/those..?

A. distinguish their own species from that of others. --> That = species

If we remove "that" then we are comparing ---> species (in A) and Others ...
According to me it should be-

and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own
species from species of

So, to refer back to species we need "THAT"

Hi,

I think ellipsis has come to play in choice E or else it would be redundant.

apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from others [' species]

Kudos [?]: 22 [0], given: 654

Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1109

Kudos [?]: 1180 [0], given: 29

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

22 Mar 2016, 11:17
Aves is right. "Others" here means "other species," so the word "that" is redundant or meaningless.
_________________

Dmitry Farber | Manhattan GMAT Instructor | New York

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Kudos [?]: 1180 [0], given: 29

Manager
Joined: 19 Mar 2015
Posts: 81

Kudos [?]: 17 [0], given: 11

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

23 Mar 2016, 09:27
PrakharGMAT wrote:
If we remove "that" then we are comparing ---> species (in A) and Others ...
According to me it should be-

and apparently this assists flies that taste the hydrocarbons on prospective mates to distinguish their own
species from species of

So, to refer back to species we need "THAT"

Even if this is what the sentence is trying to say, it should use "those" and not "that" because clearly we are talking about many species.

Kudos [?]: 17 [0], given: 11

Manager
Joined: 17 Aug 2015
Posts: 117

Kudos [?]: 18 [0], given: 647

GMAT 1: 650 Q49 V29
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

17 Jun 2016, 06:45
1
This post was
BOOKMARKED
I worked hard to spend many hours for the GMAT preparation

or
I worked hard, spending hours for the GMAT preparation.

In the first sentence, to spend hours- is not my intention or purpose

In the second sentence, spending hours is the consequence of the hard work

So choice D is wrong for that reason
choice D says, hydrocarbon assisting flies to taste

the meaning of the sentence is hydrocarbon assist flies that taste it in distinguishing their species from others (species)
'those of others' has an issue; it should just be 'others' - it's clear that the intention is to refer to other species, not to something of other species).

Kudos [?]: 18 [0], given: 647

Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1109

Kudos [?]: 1180 [1], given: 29

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

21 Jun 2016, 10:02
1
KUDOS
Expert's post
Careful, vijaisingh2001. "To," like most very common words, has a wide variety of meanings and uses. It can certainly be shorthand for "in order to," but that doesn't have to be our interpretation of D. For instance, "assisting the flies to taste" might mean "helping the flies taste." D still doesn't make sense, because then the hydrocarbons would be helping the flies to taste hydrocarbons, and the rest of the sentence wouldn't fit! Also, we don't generally use "to" with "assist." So D is certainly a mess, but you should avoid eliminating a choice because it doesn't conform to one particular possibility of usage for the word "to."
_________________

Dmitry Farber | Manhattan GMAT Instructor | New York

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Kudos [?]: 1180 [1], given: 29

Intern
Joined: 21 Jul 2016
Posts: 27

Kudos [?]: 25 [0], given: 17

GMAT 1: 690 Q50 V31
GMAT 2: 770 Q51 V42
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

13 Sep 2016, 13:03
1
This post was
BOOKMARKED
assist flies in distinguishing their own species from those of the others.
Doesn't it mean distinguishing their own species from the species of other flies.

Wherever I read about this problem, explanation goes "others" stand for "other species|. And in "those of others" means "species of species" which is wrong.

But am I wrong when I say "those of others" means "species of other flies". In this question there were other issues which helped reach "E". But I am not able to comprehend that "others" v/s "those of others" split.

For example, Distinguish their own shoes from those of others. It means to distinguish their own shoes from shoes of other people. This sentence seems correct to me.

Kudos [?]: 25 [0], given: 17

Senior Manager
Joined: 30 Jan 2016
Posts: 259

Kudos [?]: 205 [0], given: 96

Location: United States (MA)
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

14 Sep 2016, 21:53
Can "this" act as a noun in GMAT?
_________________

+1 Kudos is the best way to say "Thank you!"

Kudos [?]: 205 [0], given: 96

Intern
Joined: 01 Sep 2016
Posts: 37

Kudos [?]: 2 [0], given: 10

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

14 Nov 2016, 07:24
Hi experts. I get confused with the usage of this.Where will we use it n where not? Will really of good help if somebody explain

Posted from my mobile device

Kudos [?]: 2 [0], given: 10

Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1109

Kudos [?]: 1180 [0], given: 29

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

28 Nov 2016, 23:16
The pronoun "this" isn't inherently wrong, but as ChrisLele notes above, its meaning isn't made clear here. We often use "this" in everyday speech in ways that rely on context. The most common example is "What's this?" To understand my question, you'd have to know what I was looking at, holding, or pointing to. On the GMAT, we will generally need additional language to make the meaning clear. Take a look at two examples of "this" used correctly:

Paolo runs at least five miles a day, even when he is tired or ill, and it is this discipline that has earned him the respect of his peers.

Here, "this" is clarified as referring to discipline. What discipline? The discipline that he displays by running every day.

We have been told that the facility is safe, but everybody knows this is a lie.

What is a lie? There's only one candidate here: the statement that the facility is safe.

By contrast, the use of "this" in A and B is much less clear. Does it refer back to a single noun ("courtship")? Maybe not, but then it needs to stand in for a larger concept, as in the instances above. But is that concept the use of hydrocarbons as perfume, or the fact that this use is important in courtship? The sentence is just too hard to interpret in this form! (In that last sentence, "this form" means "the form we're discussing in A and B." )
_________________

Dmitry Farber | Manhattan GMAT Instructor | New York

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Kudos [?]: 1180 [0], given: 29

Intern
Joined: 13 Jan 2016
Posts: 4

Kudos [?]: [0], given: 3

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

29 Nov 2016, 07:20
E uses the correct idiom "assisting ... in distinguishing"

Sent from my iPhone using GMAT Club Forum mobile app

Kudos [?]: [0], given: 3

Manager
Joined: 20 Apr 2014
Posts: 116

Kudos [?]: [0], given: 23

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

29 Nov 2016, 10:16
gurpreet07 wrote:
OA is E.....

can anyone explain me...what is the difference between THOSE OF & THAT OF
i mean when to use these options

As far as i know, that of for single noun while those of for plural noun

Kudos [?]: [0], given: 23

Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1109

Kudos [?]: 1180 [0], given: 29

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe [#permalink]

### Show Tags

30 Nov 2016, 01:28
Exactly. "Those" is just the plural form of "that."
_________________

Dmitry Farber | Manhattan GMAT Instructor | New York

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Kudos [?]: 1180 [0], given: 29

Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe   [#permalink] 30 Nov 2016, 01:28
Display posts from previous: Sort by