GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 27 Jun 2019, 02:16

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Zebra mussels, a nuisance when they clog the intake pipes of nuclear

Author Message
TAGS:

### Hide Tags

Manager
Status: I am Midnight's Child !
Joined: 04 Dec 2009
Posts: 96
WE 1: Software Design and Development
Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

Updated on: 21 Mar 2019, 00:41
5
16
00:00

Difficulty:

95% (hard)

Question Stats:

49% (02:33) correct 51% (02:33) wrong based on 509 sessions

### HideShow timer Statistics

Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.

(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.

(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.

(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.

(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

_________________
Argument : If you love long trips, you love the GMAT.
Conclusion : GMAT is long journey.

What does the author assume ?
Assumption : A long journey is a long trip.

GMAT Club Premium Membership - big benefits and savings

Originally posted by maddy2u on 20 Dec 2010, 07:48.
Last edited by Bunuel on 21 Mar 2019, 00:41, edited 1 time in total.
Renamed the topic and edited the question.
Intern
Joined: 06 Oct 2010
Posts: 47
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

20 Dec 2010, 11:12
3
1
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
This is not related to the information given in the given set of facts.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
This is not related to the information given in the given set of facts.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
This is not related to the information given in the given set of facts.(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
This is not supported by the fact sets given. We are only told that the mussels feed voraciously on algae that they filter from the water that passes by them. We don't know what algae would do if mussels did not eat them.(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

This must be true since mussels consume hazardous waste. And we are not told that mussels discharge the hazardous waste that they consumed.

Intern
Joined: 14 Apr 2010
Posts: 27
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

03 Feb 2011, 11:34
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

A) Eliminate : Transatlantic freighters...new info
B) Eliminate : Mississippi River..new info
C) Eliminate : Clearing intake pipes..No mention of this has been made in the stimulus.
D) Eliminate : The algae on which the mussels feed would, if not consumed by the mussels,
Bold part here is an assumption made... and hence this answer is incorrect as whatever is said in the stimulus is taken as TRUE.
E) Correct answer: Just an extension to the last line but not to a great extent. This seems pretty obvious.

Thanks,
-V
Manager
Status: I am Midnight's Child !
Joined: 04 Dec 2009
Posts: 96
WE 1: Software Design and Development
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

03 Feb 2011, 13:54
OA is E ..

This is not a Must be true question . It is just that among the answer choices, E is the best answer choice which can be supported by the passage.
_________________
Argument : If you love long trips, you love the GMAT.
Conclusion : GMAT is long journey.

What does the author assume ?
Assumption : A long journey is a long trip.

GMAT Club Premium Membership - big benefits and savings
Intern
Joined: 06 Feb 2011
Posts: 33
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

13 Apr 2011, 03:44
vineet474 wrote:
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

A) Eliminate : Transatlantic freighters...new info
B) Eliminate : Mississippi River..new info
C) Eliminate : Clearing intake pipes..No mention of this has been made in the stimulus.
D) Eliminate : The algae on which the mussels feed would, if not consumed by the mussels,
Bold part here is an assumption made... and hence this answer is incorrect as whatever is said in the stimulus is taken as TRUE.
E) Correct answer: Just an extension to the last line but not to a great extent. This seems pretty obvious.

Thanks,
-V

Feb seems to be a long time.. Am sorry for dropping in so late.. have a query regarding the explanation given by Vineet here...

Since option D was eliminated on the basis of it having an assumption "if not consumed..." in the option, option E also has a similar assumption " if they do not transform it" ... So why does this option be true instead of D??

Secondly, Manhattan review says that Draw a Conclusion question type,
requires us to find something that must be true according to the given premises, not
something that could be true or merely sounds reasonable. So in this case option E predicts by using the word "will" in its option.

So how is E, the correct answer choice???
Can anyone explain me the logic???

Thanks.
Intern
Joined: 15 Apr 2011
Posts: 1
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

15 Apr 2011, 02:26
Well, IMO, answer should be D and not E

Not E because the premise says mussels are EVEN removing hazardouz waste, and presents it as a good thing (remember, the premise says mussels have REDEEMING qualities).
E answer sounds like finally mussels become dangerous when they eat hazardous waste, this is a contradiction of the premise.

D because "if not consumed by the mussels" is not an assumption : this answer just describe the situation where mussels are removed form the staff of the plant : then algae finally also clog pipes.
Senior Manager
Joined: 21 Dec 2010
Posts: 405
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

01 May 2011, 05:41
E is the answer.@saku your reasoning is flawed . the zebra mussels (whatever that means) improve the water quality by removing hazardous waste from the water. that they improve the quality of water is their redeeming quality.

now as the quality of water is improved , that water has no business in this question, but the zebra mussels still have the hazardous waste inside them. if that waste is not transformed , and it is still present in the same amount inside zebra muscles , the zebra muscles are themselves hazardous now, in equal amount as hazardous waste was.

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 9369
Location: Pune, India
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

08 Jun 2012, 03:51
2
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

Responding to a pm:

This is not a conclusion question per se. It is only asking you for the option which is best supported by the premises. Something that is most probable to be true based on the given premises. Since the premises tell us that the mussels remove some hazardous waste from the water, so they must have the waste inside them and if they don't transform it into non-hazardous, the mussels themselves must be hazardous. It is something we can 'infer' from the premises.
_________________
Karishma
Veritas Prep GMAT Instructor

Manager
Joined: 02 Jul 2012
Posts: 186
Location: India
Schools: IIMC (A)
GMAT 1: 720 Q50 V38
GPA: 2.6
WE: Information Technology (Consulting)
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

02 Nov 2014, 04:26
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.

Which one of the following is most strongly supported on the basis of the statements above, if they are true?

(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.

I got this one right by elimination.
A - transatlantic freighters - New Info, so wrong
B - native clams - New info, we only know about Algae and hazardous waste - Wrong
C - The passages discusses that the mussels are a mess, but didn't point out that that there's are no means to clean them.
D - No. The algae is filtered from water. It doesn't mean that the algae would clog the pipelines
E - This can be deduced. Mussels consume the hazardous waste and if they don't process the waste, the mussels would be regarded as hazardous. Ans
_________________
Give KUDOS if the post helps you...
Director
Joined: 26 Aug 2016
Posts: 617
Location: India
GMAT 1: 690 Q50 V33
GMAT 2: 700 Q50 V33
GMAT 3: 730 Q51 V38
GPA: 4
WE: Information Technology (Consulting)
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

04 May 2017, 19:34
D is wrong - out of scope- we are interested in activity of ZM not Algae. We don't know the algae's activity.
E is the only option which is talking about activity of ZM .
A B are out of scope. C is extreme.

IMO its E
Non-Human User
Joined: 01 Oct 2013
Posts: 4660
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear  [#permalink]

### Show Tags

27 Oct 2018, 10:09
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Zebra mussels, a nuisance when they clog the intake pipes of nuclear   [#permalink] 27 Oct 2018, 10:09
Display posts from previous: Sort by