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European green crabs are an invasive species which have

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European green crabs are an invasive species which have [#permalink]

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European green crabs are an invasive species which have recently colonized the Northwest coast of North America, among other places. They disrupt ecosystems and prey heavily on native shellfish. However, in Europe, the population of green crabs is kept relatively low by a parasitic barnacle called Sacculina carcini. This barnacle is hardy and could likely be introduced to areas where the European green crab threatens to ruin established ecosystems.

Which of the following, if true, most strongly supports the argument that it would NOT be advisable to attempt to eliminate European green crabs from the Northwest coast of North America by introducing to the area the parasitic barnacle discussed above?

(C) 2008 GMAT Club - s92#24

A) In their native habitat, the parasites often threaten the elimination of local green crab populations.
B) European green crabs are also occasionally preyed upon by fishes, gulls and other species of crab in their native ecosystems.
C) Though the parasite may survive in North American waters, no large-scale facility for breeding and harvesting the parasites exists as of yet.
D) Many other invasive species on the Northwest coast of North America are not suitable hosts for this parasite.
E) Though the barnacle cannot reproduce inside of native shore crabs, it can still infect and kill native shore crabs.

Can somebody pls explain?
[Reveal] Spoiler: OA

Last edited by Abhishek009 on 06 Jun 2016, 09:37, edited 1 time in total.
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New post 22 Dec 2010, 06:35
E) Though the barnacle cannot reproduce inside of native shore crabs, it can still infect and kill native shore crabs.
E is the best answer .It gives a reason why we should not introduce the barnacle in America.
C is not strong enough
A,We dont know which region does the barnacle belong to ?
If it is a native of Europe then there is a chance that the Barnacle is harmful only to the European green crabs which are a native of Europe if we go by the name.
The rest are out of scope
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Re: European green crabs are an invasive species which have [#permalink]

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New post 22 Dec 2010, 09:36
Definitely (E), since it leads to undesirable consequences which is not advisable.

A) In their native habitat, the parasites often threaten the elimination of local green crab populations -> Not related to Northwest coast of North America
B) European green crabs are also occasionally preyed upon by fishes, gulls and other species of crab in their native ecosystems. -> But this does not control their population
C) Though the parasite may survive in North American waters, no large-scale facility for breeding and harvesting the parasites exists as of yet. --> Out of scope
D) Many other invasive species on the Northwest coast of North America are not suitable hosts for this parasite. --> We are dealing with European green crabs so out of scope
E) Though the barnacle cannot reproduce inside of native shore crabs, it can still infect and kill native shore crabs. --> Leads to other destructive consequences which is not advisable.

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New post 23 Dec 2010, 02:52
I got this wrong then.However what do u mean by "native habitat".If the crabs are incroduced in the American waters the crabs still remain native to their original habitat which could be anywhere but not america
The kangaroo even when lodged in India remains a native of Australia.
???
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Typo in the OA is suppose. Check this european-green-crabs-are-an-invasive-species-106189.html
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New post 23 Dec 2010, 05:59
mailnavin1 wrote:
Typo in the OA is suppose. Check this european-green-crabs-are-an-invasive-species-106189.html

Thanks I feel much better
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Re: European green crabs are an invasive species which have [#permalink]

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Re: European green crabs are an invasive species which have [#permalink]

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Hello from the GMAT Club VerbalBot!

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Re: European green crabs are an invasive species which have [#permalink]

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New post 06 Jun 2016, 06:05
I chose E what is the OA? Please advise with explanation.
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Re: European green crabs are an invasive species which have [#permalink]

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New post 06 Jun 2016, 09:38
nilboy wrote:
I chose E what is the OA? Please advise with explanation.


(E) is the correct answer ( Updated the OA ) , check discussion on this topic here from some of the experts -

am-not-convinced-by-the-oe-given-for-the-problem-below-106189.html

Hope that Helps...
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Re: European green crabs are an invasive species which have [#permalink]

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New post 06 Jun 2016, 13:35
E is the answer that would justify "it is not advisable to introduce barnacles" because it states that such introduction would affect the existing eco system!
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Re: European green crabs are an invasive species which have [#permalink]

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New post 15 Nov 2016, 08:46
prashantbacchewar wrote:
European green crabs are an invasive species which have recently colonized the Northwest coast of North America, among other places. They disrupt ecosystems and prey heavily on native shellfish. However, in Europe, the population of green crabs is kept relatively low by a parasitic barnacle called Sacculina carcini. This barnacle is hardy and could likely be introduced to areas where the European green crab threatens to ruin established ecosystems.

Which of the following, if true, most strongly supports the argument that it would NOT be advisable to attempt to eliminate European green crabs from the Northwest coast of North America by introducing to the area the parasitic barnacle discussed above?

(C) 2008 GMAT Club - s92#24

A) In their native habitat, the parasites often threaten the elimination of local green crab populations.
B) European green crabs are also occasionally preyed upon by fishes, gulls and other species of crab in their native ecosystems.
C) Though the parasite may survive in North American waters, no large-scale facility for breeding and harvesting the parasites exists as of yet.
D) Many other invasive species on the Northwest coast of North America are not suitable hosts for this parasite.
E) Though the barnacle cannot reproduce inside of native shore crabs, it can still infect and kill native shore crabs.

Can somebody pls explain?


looks like a negative weakener = strengthener....
which one weakens the plan?

A - irrelevant
B - occasionally - not big enough
C - irrelevant. how to implement is not an issue here.
D - this one seems to support the plan
E - barnacle will damage even more the ecosystem.

E seems to be the best option
Re: European green crabs are an invasive species which have   [#permalink] 15 Nov 2016, 08:46
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