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# Nitrobacter, a bacteria living in the roots of bean plants or other

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Senior Manager
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Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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25 Apr 2018, 01:45
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75% (hard)

Question Stats:

53% (01:54) correct 47% (01:54) wrong based on 226 sessions

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Nitrobacter, a bacteria living in the roots of bean plants or other legumes, produces 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 Nitrobacter, 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 Nitrobacter living in their roots.
D Legumes are currently the only crops that produce their own supply of fixed nitrogen.
E Nitrobacter living in the roots of wheat would produce fixed nitrogen.

Source:Crackverbal

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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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25 Apr 2018, 01:52
3
Nitrobacter, a bacteria living in the roots of bean plants or other legumes, produces 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 Nitrobacter, the need for artificial fertilizers will be reduced.

The argument above makes which one of the following assumptions?

Roots of legumes are compared with the roots of non legumes. What if the roots of non legumes does not support the production of nitrogen even after hosting nictrobacter?

E points exactly the same.

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 Nitrobacter living in their roots.
D Legumes are currently the only crops that produce their own supply of fixed nitrogen.
E Nitrobacter living in the roots of wheat would produce fixed nitrogen.
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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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01 May 2018, 00:06
devikeerthansr wrote:
Nitrobacter, a bacteria living in the roots of bean plants or other legumes, produces 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 Nitrobacter, 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 Nitrobacter living in their roots.
D Legumes are currently the only crops that produce their own supply of fixed nitrogen.
E Nitrobacter living in the roots of wheat would produce fixed nitrogen.

Source:Crackverbal

If Nitrogen is not the only nutrient that must be supplied by the artificial fertilerzers and some other nutrients must also be by them ,how would use of artificial fertilizers reduce?

Can Someone please explain
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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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01 May 2018, 02:53
priyankakosaraju wrote:
devikeerthansr wrote:
Nitrobacter, a bacteria living in the roots of bean plants or other legumes, produces 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 Nitrobacter, 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 Nitrobacter living in their roots.
D Legumes are currently the only crops that produce their own supply of fixed nitrogen.
E Nitrobacter living in the roots of wheat would produce fixed nitrogen.

Source:Crackverbal

If Nitrogen is not the only nutrient that must be supplied by the artificial fertilerzers and some other nutrients must also be by them ,how would use of artificial fertilizers reduce?

Can Someone please explain

Hi priyankakosaraju,

it isn't really a problem that there could be other fertilizers because we don't have any information about them. I would say that as long as it isn't mentioned that there usage changes we can assume that their usage is constant. So if their usage remains the same and the usage of the nitrogen-based fertilizer shrinks we still would have a decrease in fertilizer usage.

Does that help?
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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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01 May 2018, 05:07
I am confused between C and E.
E gives better reasoning and works with negation rule but somehow C is also good enough to be a candidate.
Can someone tell me why to rule out C
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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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04 May 2018, 01:23
ruchik789 wrote:
I am confused between C and E.
E gives better reasoning and works with negation rule but somehow C is also good enough to be a candidate.
Can someone tell me why to rule out C

Can you tell for sure that naturally occurring strains of wheat or other grasses that have Nitrobacter living in their roots will produce Nitrogen ?

You will again need the assumption that nictrobcater in wheat will produce Nitrogen.

What if the other contents living in the roots restrict the production of nitrogen. To me C is an alternative way to get nictrobacter in the roots of Wheat but not necessarily gurantees the production of nitrogen.
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Re: Nitrobacter, a bacteria living in the roots of bean plants or other  [#permalink]

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13 May 2018, 05:18
ruchik789 wrote:
I am confused between C and E.
E gives better reasoning and works with negation rule but somehow C is also good enough to be a candidate.
Can someone tell me why to rule out C

We need to argue whether nictobactor presence in wheat(non legumes) will reduce use of fertilizers or not

C says there Are no naturally occurring strains in wheat- we are not concerned with this whether they have it or not from previously

We just need to know whether nictobactor presence will help to reduce fertilizers .C doesn't address this concern

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Re: Nitrobacter, a bacteria living in the roots of bean plants or other &nbs [#permalink] 13 May 2018, 05:18
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# Nitrobacter, a bacteria living in the roots of bean plants or other

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