GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Oct 2019, 08:45

### 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

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

Author Message
TAGS:

### Hide Tags

Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1564
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe  [#permalink]

### Show Tags

21 Jun 2016, 10:02
3
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 Prep GMAT Instructor | San Diego

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews
Intern
Joined: 21 Jul 2016
Posts: 16
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
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.
VP
Joined: 30 Jan 2016
Posts: 1159
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?
_________________
Non progredi est regredi
Intern
Joined: 01 Sep 2016
Posts: 20
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
Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1564
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 Prep GMAT Instructor | San Diego

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews
Intern
Joined: 13 Jan 2016
Posts: 4
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
Manager
Joined: 20 Apr 2014
Posts: 86
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
Manhattan Prep Instructor
Joined: 22 Mar 2011
Posts: 1564
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 Prep GMAT Instructor | San Diego

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews
Senior Manager
Joined: 06 Jul 2016
Posts: 358
Location: Singapore
Concentration: Strategy, Finance
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe  [#permalink]

### Show Tags

02 Aug 2017, 21:25
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.

Quote:
(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

'This' is used as an adjective, as per the GMAT. So what's 'this' referring to here, 'assists'? It cannot as that is a verb. Both of these are OUT!

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

Courtship assists flies? No. It's actually the presence of hydrocarbons. Plus that 'being able to' can be avoided. This is OUT!

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

Hydrocarbons assist flies to taste hydrocarbons to identify the mate? This distorts the entire meaning as it states intent on part of the flies. Plus 'those of' is not required. This is OUT!

Quote:
(E) apparently assisting flies that taste the hydrocarbons on prospective mates in distinguishing their own species from

_________________
Put in the work, and that dream score is yours!
SVP
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1685
Location: India
GPA: 3.01
WE: Engineering (Real Estate)
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe  [#permalink]

### Show Tags

26 Apr 2018, 05:22
sondenso 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 taste 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

A. "This" is used as an adjective here, and it should modify a noun. But in this sentence "this" is wrongly modifying a verb "assists".

B. Same as A.

C. "which" is modifying "courtship" here.

D. Modification error : it says "something is assisting flies to taste the hydrocarbons", and this is wrong.

E. Correct.

_________________
"Do not watch clock; Do what it does. KEEP GOING."
Manager
Joined: 27 Nov 2015
Posts: 122
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe  [#permalink]

### Show Tags

20 Feb 2019, 10:18
Re: Hydrocarbons, with which fruit flies perfume themselves in species-spe   [#permalink] 20 Feb 2019, 10:18

Go to page   Previous    1   2   [ 31 posts ]

Display posts from previous: Sort by