|
Author |
Message |
|
TAGS:
|
|
|
Senior Manager
Joined: 29 Aug 2003
Posts: 327
Location: MI
Followers: 1
Kudos [?]:
1
[0], given: 0
|
Rhizobium bacteria living in the roots of bean plants or [#permalink]
 15 Dec 2003, 14:49
Question Stats:
32% (01:47) correct
67% (01:44) wrong based on 1 sessions
Rhizobium bacteria living in the roots of bean plants or other legumes produce fixed nitrogen which is one of the essential plant nutrients and which for non-legume crops, such as wheat normally must be supplied by applications of nitrogen-based fertilizer. So if biotechnology succeeds in producing wheat strains whose roots will play host to Rhizobium bacteria. The need for artificial fertilizers will be reduced.
The argument above makes which one of the following assumptions?
(A) Biotechnology should be directed toward producing plants that do not require
artificial fertilizer.
(B) Fixed nitrogen is currently the only soil nutrient that must be supplied by
artificial fertilizer for growing wheat crops.
(C) There are no naturally occurring strains of wheat or other grasses that have
Rhizobium bacteria living in their roots.
(D) Legumes are currently the only crops that produce their own supply of fixed
nitrogen.
(E) Rhizobium bacteria living in the roots of wheat would produce fixed nitrogen.
Answers with explanation pls.
Last edited by asandeep on 16 Dec 2003, 09:22, edited 1 time in total.
|
|
|
|
|
|
|
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55
Kudos [?]:
626
[0], given: 781
|
Re: CR - Rhizobium [#permalink]
15 Dec 2003, 23:55
asandeep wrote: Rhizobium bacteria living in the roots of bean plants or other legumes produce fixed nitrogen which is one of the essential plant nutrients and which for non-legume crops, such as wheat normally must be supplied by applications of nitrogen-based fertilizer. So if biotechnology succeeds in producing wheat strains whose roots will play host to Rhizobium bacteria. The need for artificial fertilizers will be reduced.
The argument above makes which one of the following assumptions?
(A) Biotechnology should be directed toward producing plants that do not require
artificial fertilizer.
(B) Fixed nitrogen is currently the only soil nutrient that must be supplied by
artificial fertilizer for growing wheat crops.
(C) There are no naturally occurring strains of wheat or other grasses that have
Rhizobium bacteria living in their roots.
(D) Legumes are currently the only crops that produce their own supply of fixed
nitrogen.
(E) Rhizobium bacteria living in the roots of wheat would produce fixed nitrogen.
Answers with explanation pls.
B is best.
if there are other nutrients to be supplied , just having fixed nitrogen
will not reduce need for fertilizers. We still would have to use the artificial fertilizer.
|
|
|
|
|
|
Intern
Joined: 27 Nov 2003
Posts: 39
Location: Moscow
Followers: 0
Kudos [?]:
1
[0], given: 0
|
I agree with B too
_________________
me
|
|
|
|
|
|
Senior Manager
Joined: 12 Oct 2003
Posts: 289
Location: sydney
Followers: 1
Kudos [?]:
1
[0], given: 0
|
B or E. tough call... i wud choose E. B , to me, sounds very strong.
official ans??
_________________
When u r about to make ends meet, someone moves the ends.
|
|
|
|
|
|
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55
Kudos [?]:
626
[0], given: 781
|
mbamantra wrote: B or E. tough call... i wud choose E. B , to me, sounds very strong.
official ans??
ya, E is tempting.
but note , the author adds an "IF" to the conclusion.
so he is not assuming E...he has already mentioned E in the passage.
thanks
praetorian
|
|
|
|
|
|
Senior Manager
Joined: 29 Aug 2003
Posts: 327
Location: MI
Followers: 1
Kudos [?]:
1
[0], given: 0
|
Official ans : E
B was too tempting to resist 
|
|
|
|
|
|
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55
Kudos [?]:
626
[0], given: 781
|
asandeep wrote: Official ans : E B was too tempting to resist wow, this was a tough one.
|
|
|
|
|
|
Manager
Joined: 29 Aug 2003
Posts: 52
Location: Detroit, MI
Followers: 0
Kudos [?]:
1
[0], given: 0
|
I chose E for my answer.
Can we say that B is the answer for the conclusion rather than for the argument?
By conclusion, I mean "If biotechnology succeeds in doing so, the need for artificial fertilizers would decrease"
|
|
|
|
|
|
Intern
Joined: 27 Nov 2003
Posts: 39
Location: Moscow
Followers: 0
Kudos [?]:
1
[0], given: 0
|
I believe the word "decrease", makes B a bit weaker than E.
|
|
|
|
|
|
SVP
Joined: 03 Feb 2003
Posts: 1683
Followers: 4
Kudos [?]:
16
[1] , given: 0
|
1
This post received
KUDOS
An assumption is verified best via its negation. The converse of E perfectly destoys the conclusion.
|
|
|
|
|
|
Senior Manager
Joined: 29 Aug 2003
Posts: 327
Location: MI
Followers: 1
Kudos [?]:
1
[0], given: 0
|
stolyar wrote: An assumption is verified best via its negation. The converse of E perfectly destoys the conclusion.
agree with stolyar
|
|
|
|
|
|
Director
Joined: 21 Dec 2010
Posts: 657
Followers: 9
Kudos [?]:
58
[0], given: 51
|
Re: CR - Rhizobium [#permalink]
07 May 2011, 11:08
i prephrased it to E but then felt B was also weakening the conclusion.
_________________
What is of supreme importance in war is to attack the enemy's strategy.
|
|
|
|
|
|
VP
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1400
Followers: 8
Kudos [?]:
84
[0], given: 10
|
Re: CR - Rhizobium [#permalink]
26 May 2011, 01:58
The argument circles around R bacteria.If bacteria themselves do not produce Fixed nitrogen then there is not point in developing the strains. E is the best choice of the lot.
_________________
Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!
|
|
|
|
|
|
Manager
Status: UC Berkeley 2012
Joined: 03 Jul 2010
Posts: 191
Location: United States
Concentration: Economics, Finance
GPA: 4
WE: Consulting (Investment Banking)
Followers: 3
Kudos [?]:
11
[0], given: 10
|
Re: CR - Rhizobium [#permalink]
29 May 2011, 08:55
E is the answer, B cannot be because even if blabla is not the only soil, then the use of artificial fertilizar could still be reduced because you do not need any for blabla.
|
|
|
|
|
|
Manager
Joined: 07 Mar 2011
Posts: 71
Location: Canada
Concentration: Entrepreneurship, Finance
Schools: Chicago (Booth) - Class of 2014
GMAT 1: 710 Q50 V36
GPA: 3.3
WE: Other (Other)
Followers: 0
Kudos [?]:
11
[0], given: 1
|
Re: CR - Rhizobium [#permalink]
31 May 2011, 04:32
E since negation destroys the argument. B didn't go with B because the argument states artificial fertilizers need only be reduced, not completely eliminated.
_________________
Sent from my Slapchop
|
|
|
|
|
|
SVP
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1756
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 50
Kudos [?]:
145
[0], given: 108
|
Re: CR - Rhizobium [#permalink]
31 May 2011, 09:53
+1 E
_________________
"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."
My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Director
Status: GMAT Learner
Joined: 14 Jul 2010
Posts: 672
Followers: 21
Kudos [?]:
108
[0], given: 31
|
Re: CR - Rhizobium [#permalink]
31 May 2011, 14:39
|
|
|
|
|
|
Intern
Joined: 29 May 2011
Posts: 5
Followers: 0
Kudos [?]:
0
[0], given: 0
|
Re: CR - Rhizobium [#permalink]
31 May 2011, 18:58
Interesting
|
|
|
|
|
|
Manager
Status: Completed GMAT on 22 Nov 2011
Joined: 08 Nov 2010
Posts: 167
Followers: 6
Kudos [?]:
31
[0], given: 12
|
Re: CR - Rhizobium [#permalink]
03 Jun 2011, 01:16
I don't know, I think I am mastering the CR section with ease. Got this one also right. With this answer, my rally is 15 (one single streak 
|
|
|
|
|
|
Intern
Joined: 23 Jan 2011
Posts: 13
Followers: 0
Kudos [?]:
2
[0], given: 0
|
Re: CR - Rhizobium [#permalink]
03 Jun 2011, 18:21
The conclusion states that the need for artificial fertilizers will be reduced, not eliminated. So this leaves the possibility that there are other nutrients that still need to be supplied, so B) is not a necessary premise.
The purpose of having the bacteria in the roots of wheat is to produce nitrogen for the plant, so the stimulus is assuming that if biotechnology succeeds to have the bacteria in the wheat roots, the bacteria will work in the same way as in the roots of legumes and produce nitrogen. E) is the correct answer.
|
|
|
|
|
|
|
Re: CR - Rhizobium
[#permalink]
03 Jun 2011, 18:21
|
|
|
|
|
|
|
|
|
|
Moderators:
metallicafan, rajeevrks27, souvik101990, PTK, MacFauz, noboru, kissthegmat, carcass, willigetmylifeback, mikemcgarry, doe007, Vercules, Legendaddy, tuanquang269, RaviChandra, Marcab, Narenn
|
close
