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# The number of plant and animal species that humans are known

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Intern
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The number of plant and animal species that humans are known [#permalink]

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20 Aug 2007, 16:08
10
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Difficulty:

45% (medium)

Question Stats:

55% (00:46) correct 45% (00:59) wrong based on 508 sessions

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The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) ""

B) humans are known as having forced to become extinct

C) humans are known for forcing to become extinct

D) are known that humans are forced to become extinct

E) are known as having been forced to extinction by humans
[Reveal] Spoiler: OA

Last edited by pqhai on 03 Dec 2013, 23:56, edited 1 time in total.

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Re: SC - plant and animal species [#permalink]

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20 Aug 2007, 18:22
ikk102 wrote:
The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) ""

B) humans are known as having forced to become extinct

C) humans are known for forcing to become extinct

D) are known that humans are forced to become extinct

E) are known as having been forced to extinction by humans

E. all others choices change the meaning.

original meaning : The number of plant and animal species is forced to become extinct by humans. should not changed to that "the humans themselves are forced to become extinct."

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Re: SC - plant and animal species [#permalink]

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20 Aug 2007, 19:21
ikk102 wrote:
The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) ""

B) humans are known as having forced to become extinct

C) humans are known for forcing to become extinct

D) are known that humans are forced to become extinct

E) are known as having been forced to extinction by humans

Well simple one I guess . E .
"The number of plant and animal species that" should be close "forced to extiction" that "human" . Only E gives that opportunity

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20 Aug 2007, 20:39
A,B,C -> humans following 'The number of plant and animal species that that' results in awkward sentence

D -> suggests humans became extinct

E is best.

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20 Aug 2007, 20:59
this was a tough one indeed... only by POE was I able to come up with E.. the other ones just didn't make much sense!

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20 Aug 2007, 21:13
Well guys and girls, the OA is actually A.

I got this on GMATPrep test 2 right smack in the middle of the verbal section.

Still not sure why...

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20 Aug 2007, 21:48
I prefer "known to" and I selected A.

"known as" can be usually substituted with "called as" and they both are usually followed by nouns. But it doesnt sound great here.

whereas "known to" can be followed by actions.

He is known to do something.

This is the logic I used. It could be wrong. I wonder what the OE is.

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20 Aug 2007, 22:04
The only answer that attracted my attention except for A, was C, because there is a set phrase to be known for...but I stick to A, because, normally, the pattern when there is only one solid choice except for A, repeats itself with A as correct answer. That's why A.
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21 Aug 2007, 10:12
Guys this is Straight A. Now please notify the subject header as GMATPrep question if it is one. I havent taken GMATPrep 2 and now I know this question. I hope I dont get this one as it will skew my performance.

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Re: The number of plant and animal species that humans are known [#permalink]

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03 Dec 2013, 21:16
Its a clear A. Besides E is passive and it has a massive red flag "being".

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Re: The number of plant and animal species that humans are known [#permalink]

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04 Dec 2013, 00:05
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NOTES

1. Subject-verb agreement.
"The number of X..." is singular
"A number of X.." is plural.

2. Correct idioms:
Known AS
Known TO

3. Wrong idiom:
Known for Verb-ing.

APPLY TO THE QUESTION.

The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) humans are known to have forced to extinction
Correct.

B) humans are known as having forced to become extinct
Wrong."forced to extinction" is clearer, more concise than "forced to become extinct"

C) humans are known for forcing to become extinct
Wrong. "known for forcing" is not idiomatic.

D) are known that humans are forced to become extinct
Wrong. "the number of.." is singular --> "are" is wrong.

E) are known as having been forced to extinction by humans
Wrong. "the number of.." is singular --> "are" is wrong.

Hope it helps.
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Re: The number of plant and animal species that humans are known [#permalink]

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17 Dec 2014, 20:02
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: The number of plant and animal species that humans are known [#permalink]

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05 Apr 2015, 09:12
pqhai wrote:
NOTES

1. Subject-verb agreement.
"The number of X..." is singular
"A number of X.." is plural.

2. Correct idioms:
Known AS
Known TO

3. Wrong idiom:
Known for Verb-ing.

APPLY TO THE QUESTION.

The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) humans are known to have forced to extinction
Correct.

B) humans are known as having forced to become extinct
Wrong."forced to extinction" is clearer, more concise than "forced to become extinct"

C) humans are known for forcing to become extinct
Wrong. "known for forcing" is not idiomatic.

D) are known that humans are forced to become extinct
Wrong. "the number of.." is singular --> "are" is wrong.

E) are known as having been forced to extinction by humans
Wrong. "the number of.." is singular --> "are" is wrong.

Hope it helps.

How did u apply SVA rule here..?

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Re: The number of plant and animal species that humans are known [#permalink]

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11 Oct 2015, 06:00
pqhai wrote:
NOTES

1. Subject-verb agreement.
"The number of X..." is singular
"A number of X.." is plural.

2. Correct idioms:
Known AS
Known TO

3. Wrong idiom:
Known for Verb-ing.

APPLY TO THE QUESTION.

The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) humans are known to have forced to extinction
Correct.

B) humans are known as having forced to become extinct
Wrong."forced to extinction" is clearer, more concise than "forced to become extinct"

C) humans are known for forcing to become extinct
Wrong. "known for forcing" is not idiomatic.

D) are known that humans are forced to become extinct
Wrong. "the number of.." is singular --> "are" is wrong.

E) are known as having been forced to extinction by humans
Wrong. "the number of.." is singular --> "are" is wrong.

Hope it helps.

I think your OA is correct, but reasoning feels bit dicey!! No offence. :D

"The number of x" is singular here and has the verb "is" at the end of the sentence.
first verb "are" in all 5 options is referring to subject species. So, it is correct.

Also "Extinction" should be in the end of underline, as sentence talks about "extinctions in the last half...". The most popular choice E sounds like " the species were forced to extinction by humans in the last half....

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Re: The number of plant and animal species that humans are known [#permalink]

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11 Oct 2015, 23:18
Quote:
'to become extinct' does seem, to my eyes, more awkward and wordy than 'to extinction', but there are other issues in choices b and c.

choice b:
biggest problem = incorrect idiom: 'known as having forced'
known as is used with nouns: al capone was known as a gangster rather than as a tax cheat, but he was ultimately imprisoned only on charges of tax evasion.

with verbs, you have to use 'known to infinitive' or 'known for gerund'.

choice c:
fatal change of meaning.
this sentence implies that we are currently 'forcing [these species] to become extinct', a meaning that not only differs from the original but also borders on absurdity.
the original meaning, which we're not allowed to change, is that humans have forced the species into extinction at some point in the last 500 years, not that humans are doing so currently.
analogies:
the island's natives are known for stealing tourists' money, passports, and jewelry. --> these things go on today
the island's natives are known to have stolen tourists' money, passports, and jewelry. --> not necessarily still happening, but it has happened at some point

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Re: The number of plant and animal species that humans are known [#permalink]

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27 Aug 2016, 08:24
The number of plant and animal species that humans are known to have forced to extinction in the last half millenium is over 800.

A) ""

B) humans are known as having forced to become extinct

C) humans are known for forcing to become extinct

D) are known that humans are forced to become extinct

E) are known as having been forced to extinction by humans

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Re: The number of plant and animal species that humans are known   [#permalink] 27 Aug 2016, 08:24
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