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Sixty-five million years ago, according to some scientists, an asteroi

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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 26 May 2019, 04:21
The whole sentence deals with the past,
The end of the sentence should be marked(past tense) how could it be just mark?
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 23 Aug 2019, 00:35
GMATNinja EXPERT
in option "E" that is a singular pronoun referring to plural "Extinctions" isnt it incorrect.

or is "that" acting as a modifier ?
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 25 Aug 2019, 22:09
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hero_with_1000_faces wrote:
GMATNinja EXPERT
in option "E" that is a singular pronoun referring to plural "Extinctions" isnt it incorrect.

or is "that" acting as a modifier ?
Hi hero_with_1000_faces,

Yes, the that is a modifier. It refers to an event.

... an event that caused the plant and animal extinctions...
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 25 Aug 2019, 22:29
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AjiteshArun wrote:
hero_with_1000_faces wrote:
GMATNinja EXPERT
in option "E" that is a singular pronoun referring to plural "Extinctions" isnt it incorrect.

or is "that" acting as a modifier ?
Hi hero_with_1000_faces,

Yes, the that is a modifier. It refers to an event.

... an event that caused the plant and animal extinctions...



Thanks Ajitesh, for clearing my doubt!
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 26 Aug 2019, 00:32
AjiteshArun wrote:
hero_with_1000_faces wrote:
GMATNinja EXPERT
in option "E" that is a singular pronoun referring to plural "Extinctions" isnt it incorrect.

or is "that" acting as a modifier ?
Hi hero_with_1000_faces,

Yes, the that is a modifier. It refers to an event.

... an event that caused the plant and animal extinctions...


The whole sentence deals with the past,
The end of the sentence should be marked(past tense) how could it be just mark?
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 26 Aug 2019, 20:15
Anirudddh wrote:
The whole sentence deals with the past,
The end of the sentence should be marked(past tense) how could it be just mark?
Hi Anirudddh,

A case can be made for the past tense marked, but we'll need to look at the intended meaning to see why this sentence uses the present tense mark.

...the plant and animal extinctions that mark the end of the geologic era known as the Cretaceous Period.

The that mark... is used to describe the plant and animal extinctions. These extinctions still "mark" the end of the Cretaceous Period. That's why the sentence uses the present tense mark instead of the past tense marked. If we use extinctions that marked the end of the Cretaceous Period, a reader might end up thinking that the extinctions no longer mark the end of the Cretaceous Period.
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Re: Sixty-five million years ago, according to some scientists, an asteroi  [#permalink]

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New post 12 Sep 2019, 10:58
GMATNinja wrote:
This one isn't too awful, compared to some of the QOTDs we'll inflict on you later this week. For the most part, this is a nice story about straightforward uses of "that" and "which" modifiers, with some meaning stuff thrown in.

The uses of "that" and "which" can get nastier, though. Check out last Monday's YouTube webinar for more on the various uses of "that" on the GMAT... and we'll feature the other examples from the webinar as QOTDs later this week.

Quote:
A. which, causing plant and animal extinctions, marks

"Which" can only modify "North America" here, and that makes no sense at all: "North America, which... marks the end of the geologic era"?! The placement of the "-ing" modifier doesn't seem great, either. Eliminate (A).

Quote:
B. which caused the plant and animal extinctions marking

Again, the modifier beginning with "which" is modifying "North America" again, and that makes no sense: "North America, which caused the plant and animal extinctions..." Eliminate (B).

Quote:
C. and causing plant and animal extinctions that mark

I'm OK with the use of "that" here, but the parallelism doesn't work. The parallelism marker "and" is followed by "causing plant and animal extinctions", and I can't find anything in the sentence that could possibly be parallel to "causing." (C) is gone.

Quote:
D. an event that caused plant and animal extinctions, and it marks

The last part of the underlined portion makes me hesitate: "it" could refer to "event", I guess. So "...an event that caused plant and animal extinctions, and the event marks the end of the geologic era..." That's not awful, but I really don't understand why we're starting a whole new clause there, with "event" as the subject. It makes a whole lot more sense when the end of the sentence says "... marks the end of the geologic era..." function as a modifier for "extinctions" -- and that's exactly what (E) does.

Since "it" is the subject of the second clause, you could also argue that it refers back to the subject of the first clause: "an asteroid bigger than Mount Everest." But that wouldn't really make much sense, either: the asteroid marks the end of the geologic era? Hm, not so sure about that one. But either way: even if you're OK with the pronoun, (E) does a much better job of conveying the meaning of the sentence.

Incidentally, there's another version of this answer choice in the verbal guide (any edition): "an event that caused plant and animal extinctions, which marks..." Clearly, that's wrong for a different reason: "extinctions... marks" is a clear subject-verb error.

Either way, (D) is gone.

Quote:
E. an event that caused the plant and animal extinctions that mark

(E) has two "thats", and they're both perfectly fine. The event caused the plant and animal extinctions, and the extinctions mark the end of the geologic era. Nice and clear. (E) wins.


GMATNinja - i find the use of the present tense 'mark' to be a bit bizarre; in my opinion it would make mone sense to say 'marked' instead, as the events we're talking about are clearly in the past. Does that make sense? Tks! :)
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Re: Sixty-five million years ago, according to some scientists, an asteroi   [#permalink] 12 Sep 2019, 10:58

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