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# Potato cyst nematodes are a pest of potato crops. The

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Potato cyst nematodes are a pest of potato crops. The [#permalink]

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04 Sep 2008, 19:20
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Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.
Which of the following, if true, best supports the claim that the company’s plan will be successful?
(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
(B) The only part of a potato plant that a nematode eats is the roots.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.
(E) The chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.

Help needed !!!pls share the line of thinking
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05 Sep 2008, 14:40
I think the ans is B
If we apply the chemicals and the nematodes come out from cyst which can only live on potato roots then the nematodes will be starved to death (as it has been described to apply the chemical when there is no plantation).
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05 Sep 2008, 19:01
subarao wrote:
I think the ans is B
If we apply the chemicals and the nematodes come out from cyst which can only live on potato roots then the nematodes will be starved to death (as it has been described to apply the chemical when there is no plantation).

In the argument should we take main point as nematodes starving to death or spreading pesticides leads to nematodes emerging ??Option B talks about just necessity of roots for nematodes ,even option A says ,thus emerged roots can be killed !!! claim here says we need to spread chemicals on the fields so that nematodes emerge and thereby starve to death.!!!
Noiw im confused how do v solve this
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24 Sep 2008, 22:46
spriya wrote:
Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.
Which of the following, if true, best supports the claim that the company’s plan will be successful?
(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
(B) The only part of a potato plant that a nematode eats is the roots.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.
(E) The chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.

Help needed !!!pls share the line of thinking

I feel D must be the answer.
P1: nematodes are a pest of potato crops
P2: Only relevant chemicals help emerge of nematodes
C1: When no potatoes are planted spread new chemical > starve to death
A. They will be killed due to starving not any poisonous effect
B. Only part is root but there is no plantation so irrelevant
C. May be true but not helping
D. If trial was successful, nematodes would come out from cyst > so starve to death
E. We are not applying frequently. So OOS
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15 Oct 2008, 11:10
spriya wrote:
Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.
Which of the following, if true, best supports the claim that the company’s plan will be successful?
(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
(B) The only part of a potato plant that a nematode eats is the roots.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.
(E) The chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.

Help needed !!!pls share the line of thinking

I will go with D
D is giving a proof that spreading minute quantities of the chemical on potato fields has the desired effect. So D supports the company's claim.
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15 Oct 2008, 11:35
spriya wrote:
Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.
Which of the following, if true, best supports the claim that the company’s plan will be successful?
(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
(B) The only part of a potato plant that a nematode eats is the roots.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.
(E) The chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.

Help needed !!!pls share the line of thinking

E will explain if thats OA
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13 Feb 2009, 19:58
OA is D, this is from the Paper Test 52.
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09 Feb 2010, 08:50
Option B looks convincing to me.Because,
COmpany's cliam will be succesful only when the nematodes are dead, not by just emerging them out. SO option B says that nematodes dont eat anything else but root of the potatoes. Hence option B supports the claim.

However, option D helps DRAWING the claim but not supporting the claim.
BAsed on option D, nematodes might come out from their cysts but whats the guarantee that they starve to death. Uless until it is substantiated with option B, the company's claim can't be supported.

Is there any thing wrong in my reasoning? or Did I completely miss the track of the question?
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19 Nov 2011, 04:08
nj1kor wrote:
Option B looks convincing to me.Because,
COmpany's cliam will be succesful only when the nematodes are dead, not by just emerging them out. SO option B says that nematodes dont eat anything else but root of the potatoes. Hence option B supports the claim.

However, option D helps DRAWING the claim but not supporting the claim.
BAsed on option D, nematodes might come out from their cysts but whats the guarantee that they starve to death. Uless until it is substantiated with option B, the company's claim can't be supported.

Is there any thing wrong in my reasoning? or Did I completely miss the track of the question?

Hi,

I think B is quite similar to E, when you think of eliminating it.
B talks about the only inclusion of roots as a mention. However, the company's plan is to spread the chemicals on vacant fields, hence this OOS.

Similarly, E, talks about all the time when the plant is growin - OOS
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Re: Potato cyst nematodes are a pest of potato crops. The [#permalink]

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13 Dec 2011, 03:01
I confuse between E and D, but I found that I read incorrectly in choice E. It's really out of scope.
In the argument, which states that nematodes lie dormant for several years in their cysts, which are protective capsules, and do not emerge ...

After reading the argument, my first assumption is the new pesticide will contain the chemical similar to the chemical that emitted from the root of potatoes, making the nematodes emerge. Choice D is exactly what I thinking.

(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.

Poor for me when being distracted by choice E
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Re: Potato cyst nematodes are a pest of potato crops. The [#permalink]

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26 Dec 2011, 12:18
D
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Re: Potato cyst nematodes are a pest of potato crops. The [#permalink]

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22 May 2013, 11:28
I chose B when I attempted this question but now I realized that B is actually out of scope.

A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.

(B) The only part of a potato plant that a nematode eats is the roots. --

I was thinking that No potatoes/potato roots will be present for nematodes to eat,so they will die.No.

The argument is to make them emerge from their protective cyst(not to kill them,we dont care whether they die or not),which only happens when potato roots emit certain chemicals.If making them emerge from their cyst is considered WIN and there will be no potato roots present,then definitely it is the magic of new chemical,which is exactly what company is trying to test.
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Re: Potato cyst nematodes are a pest of potato crops. The [#permalink]

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26 Aug 2016, 06:35
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Re: Potato cyst nematodes are a pest of potato crops. The   [#permalink] 26 Aug 2016, 06:35
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