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Scientists have recently found evidence that black holes—regions of sp

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Scientists have recently found evidence that black holes—regions of sp  [#permalink]

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New post Updated on: 08 Dec 2018, 07:29
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Masterscorp


The basic concept of using that in two-part sentences.
If Something does two things, those things must be presented parallelly in structure and meaning joined by the introducing connector 'that.' For example. we may say that
<John reported his wife that he got 800 in GMAT and that it all happened because of her help >
We need the connector that because of the two equally important things.
Rule No 2. If you are reporting only one thing and if the second part is n independent event not related to the first, then the golden rule is that there must be a comma before the word 'and' to forewarn that a new clause is about to begin
In my example, we might re-write the whole thing if we drop the that.
John reported to his wife that he got 800 in GMAT,
and it all happened because of her help. But still one can see the disconnect in that legitimately grammatical clause
In other words, when we write compound sentences with two independent terms, then there must necessarily be a comma before the fanboys conjunction

I fully agree with Masterscorp
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Originally posted by daagh on 09 Apr 2018, 07:52.
Last edited by daagh on 08 Dec 2018, 07:29, edited 1 time in total.
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QOTD: Scientists have recently found evidence that black holes  [#permalink]

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New post 25 May 2018, 06:14
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souvik101990 wrote:

Verbal Question of The Day: Day 260: Sentence Correction


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Scientists have recently found evidence that black holes—regions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from them—probably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

(A) exist at the core of nearly all galaxies and the mass of each black hole is proportional to

(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of

(C) exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to

(D) exists at the core of nearly all galaxies, and that the mass of each black hole is proportional to that of

(E) exists at the core of nearly all galaxies and the mass of each black hole is proportional to that of

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.



GMATNinja what function does dash sign have in this senntence ?

Scientists have recently found evidence that black holesregions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from themprobably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

i chose actually D ....i thought "nothing" refers to 'exists"

you can answer this question on the weekend :) when you are in better mood :)
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Re: QOTD: Scientists have recently found evidence that black holes  [#permalink]

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New post 25 May 2018, 09:57
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dave13 wrote:

GMATNinja what function does dash sign have in this senntence ?

Scientists have recently found evidence that black holesregions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from themprobably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

i chose actually D ....i thought "nothing" refers to 'exists"

you can answer this question on the weekend :) when you are in better mood :)




Hello dave13,


Although this question is not for me, I would be glad to help you out with this. :-)


In this official sentence, the two dashes have been used as a comma pair to enclose some extra description, in this case the description of the black holes.


As far as your choosing Choice D as the correct answer is considered, I would say that Choice D and E are the easiest choices to reject because the SV number agreement error is the easiest to spot.



Hope this helps. :-)
Thanks.
Shraddha
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Re: QOTD: Scientists have recently found evidence that black holes  [#permalink]

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New post 01 Jun 2018, 18:46
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dave13 wrote:
souvik101990 wrote:

Verbal Question of The Day: Day 260: Sentence Correction


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For All QOTD Questions Click Here


Scientists have recently found evidence that black holes—regions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from them—probably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

(A) exist at the core of nearly all galaxies and the mass of each black hole is proportional to

(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of

(C) exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to

(D) exists at the core of nearly all galaxies, and that the mass of each black hole is proportional to that of

(E) exists at the core of nearly all galaxies and the mass of each black hole is proportional to that of

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.



GMATNinja what function does dash sign have in this senntence ?

Scientists have recently found evidence that black holesregions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from themprobably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

i chose actually D ....i thought "nothing" refers to 'exists"

you can answer this question on the weekend :) when you are in better mood :)

I know that this doesn't really answer your question (and somebody else already answered it, anyway)... but here's a video about punctuation on GMAT SC: https://www.youtube.com/watch?v=JLAJ_drP8UM.

The punchline is basically that there's no real reason to worry much about the exact rules surrounding dashes, partly because English-language editors (I used to be one!) and style experts don't remotely agree on the best ways to use dashes. If you pick up a bunch of the world's best publications written in English, you'll see a whole bunch of different opinions about how to use dashes correctly -- and about whether they should be used at all. Some editors hate them.

And on the GMAT? You'll see dashes, but they're never really the deciding factor, partly because I don't think that the GMAT wants to try to settle a broader debate about dashes. On official questions, there are always more important issues in the sentence, and you can always answer the question without really worrying about whether a dash was the best choice of punctuation.

I hope this helps!
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Re: QOTD: Scientists have recently found evidence that black holes  [#permalink]

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New post 01 Jun 2018, 19:03
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IMO ans is B.

(A) exist at the core of nearly all galaxies and the mass of each black hole is proportional to incorrect, need 'that' after 'and' for parallelism

(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of correct

(C) exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to incorrect, illogical comparison between mass and galaxy

(D) exists at the core of nearly all galaxies, and that the mass of each black hole is proportional to that of incorrect, SV agreement 'black holes' is a plural noun

(E) exists at the core of nearly all galaxies and the mass of each black hole is proportional to that of incorrect, same as D
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Re: QOTD: Scientists have recently found evidence that black holes  [#permalink]

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New post 21 Aug 2018, 02:01
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The sentence says that scientists have recently found evidence for two things.

The black holes probably exist at the core of nearly all galaxies
The mass of each black hole is proportional to its host galaxy
Please note that the sentence also provides a lot of information about black holes within two dashes. You can read the idea between the dashes. However, the more important thing is that when you start reading after the closing dash, read as if the dashes and everything contained within the dashes weren’t there. In other words, you shouldn’t get lost in the deluge of information in the dashes and should be able to connect the part of the sentence that appears after the dashes to the part before the dashes.

There are two problems with this sentence:

“That” is missing after ‘and’. To make it clear that the evidence suggests “that the mass of each…”, we need to place ‘that’ before “the mass of each…”. Without ‘that’, it may seem like another independent clause having nothing to do with evidence.
The second problem is with the meaning. It doesn’t make sense to say that the mass of X is proportional to a galaxy. Probably, we mean to say that the mass of X is proportional to the mass of a galaxy. Therefore, the second part of the sentence should be modified to say “proportional to the mass of its host galaxy”. Please note that when we are evaluating the options, we need to be flexible i.e. even though it seems to be “proportional to the mass of its host galaxy”, it may eventually turn out to be “proportional to the size of its host galaxy”.
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Re: Scientists have recently found evidence that black holes—regions of sp  [#permalink]

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New post 07 Dec 2018, 11:36
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amatya wrote:
Scientists have recently found evidence that black holes—regions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from them—probably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.


(A) exist at the core of nearly all galaxies and the mass of each black hole is proportional to

(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of

(C) exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to

(D) exists at the core of nearly all galaxies, and that the mass of each black hole is proportional to that of

(E) exists at the core of nearly all galaxies and the mass of each black hole is proportional to that of


First, we can IGNORE the appositive phrase "regions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from them"

So, we can read the original sentence as: Scientists have recently found evidence that black holes exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.

Scanning the answer choices, we see EXIST vs EXISTS
Since the verb must agree with BLACK HOLES (plural), we need the plural verb EXIST.
ELIMINATE D and E

Next, notice that the scientists discovered two things:
#1) that black holes exist at the core of nearly all galaxies
#2) the mass of each black hole is proportional to its host galaxy.

Item #1 is a relative clause beginning with THAT.
So, to maintain parallelism, item #2 must also begin with THAT

In other words, we need: Scientists have recently found evidence THAT black holes exist at the core of nearly all galaxies and THAT the mass of each black hole is proportional to its host galaxy.
ELIMINATE A.

We're left with answer choices B and C
B) Scientists have recently found evidence that black holes exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of its host galaxy.
We are comparing the MASS of each black hole to THAT (aka the MASS) of its host galaxy.
Since we're logically comparing masses, we can KEEP B for now

C) Scientists have recently found evidence that black holes exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to its host galaxy.
Here, we're comparing the MASS of each black hole to a HOST GALAXY.
This comparison makes no sense.
ELIMINATE C

By the process of elimination, the correct answer is B

Cheers,
Brent
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