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The number of plant and animal species that humans are known to have

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

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New post Updated on: 29 Nov 2017, 01:45
2
00:00
A
B
C
D
E

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  5% (low)

Question Stats:

81% (00:58) correct 19% (01:14) wrong based on 244 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) humans are known to have forced to extinction

(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

Originally posted by shailu22 on 25 Mar 2006, 19:08.
Last edited by hazelnut on 29 Nov 2017, 01:45, edited 1 time in total.
Edited the question.
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Re: The number of plant and animal species that humans are known to have  [#permalink]

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New post 04 Dec 2013, 00:05
5
2
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 to have  [#permalink]

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New post 24 Jun 2006, 06:18
1
A.

The only other close option is E, and it is passive. Hence A.
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Re: The number of plant and animal species that humans are known to have  [#permalink]

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New post 07 Sep 2017, 07:44
Idiom.

"Known" + to

Humans are known to have done something. Only A gets it right.
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Re: The number of plant and animal species that humans are known to have  [#permalink]

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New post 10 Sep 2018, 01:12
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 to have   [#permalink] 10 Sep 2018, 01:12
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