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Potato cyst nematodes are a pest of potato crops. The nematodes can li

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

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New post 04 Jun 2008, 16:13
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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 in 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.
[Reveal] Spoiler: OA

Last edited by hazelnut on 27 Oct 2017, 15:27, edited 1 time in total.
Edited the question.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 04 Jun 2008, 16:48
Argument: When no potato crop, spreading chemical results in staving of nematodes.

(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides. [Irrelevant – eliminate it]

(B) The only part of a potato plant that a nematode eats is the roots. [Hold it]

(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts. [Bacteria not discussed – eliminate it]

(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. [Hold it]

(E) the chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing. [May be true but doesn’t help the argument – eliminate it]

Between B and D:
D states spreading on potato fields results in 95% emerging. But the company plan deals with when no potato crop exists.

B: If Nematodes eats except to root of the potato tree, then spreading chemical when no crop will fail the company’s plan.

Hence : B

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 04 Jun 2008, 17:06
C it is ...

goalsnr 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 in 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 [conclusion].

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. <-- Irrelevant cos the aim is to starve the nematodes not to spray pesticides on them

(B) The only part of a potato plant that a nematode eats is the roots. <-- tempting choice, could be possibly correct. However the reason why I eliminated this is that the plan clearly talks about killing the nematode using the chemical when no fields are planted. It doesn't relate to the conclusion enough

(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts. <-- this is the only one that supports the plan since it clearly says that having the potato plants will clearly impede with the plan.

(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. <-- This is a tempting choice but incorrect. Since the plan talks about startving the nematodes, not how many nematodes its going to starve.

(E) the chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing. <-- irrelevant for the same reason as B. There are going to be no potato plants for the plan to work.


GIve your reasons for choosing or not choosing B.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 05 Jun 2008, 07:45
It was hard to me to understand what's the meaning of the passage. After that it was a piece of cake.
Exactly B because when farmers use the chemical the nematodes leave the cysts and then die without food due to the lack of potato roots. Maybe my english is not the best but I hope it's clear.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 05 Jun 2008, 15:41
I think the answer is D.
Reason: the conclusion is that "any nematodes that emerge will soon starve to death". So, the company has found the chemicals to stimulate the emergence of nematodes without potatoes. This causes nematodes starve to death.
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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 05 Jun 2008, 16:14
goalsnr 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 in 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.


GIve your reasons for choosing or not choosing B.


Company's claim: Because of our chemicals , nematodes will soon starve to death.
We want to support their claim.
A - this is opposite answer. It says nematodes die because of pesticides. But the claim is nematodes will die because of starvation. Out
B - This may be tempting but it is very far away from the claim. It does not talk about chemicals, nor does it talk about how nematodes die. It is simply putting forward one of the characteristics of nematodes. Out of scope.
C - out
D - minute quantities -- nine tenths of nematodes emerge.
This choice is directly addressing the claim. It is clearly repeating what company has claimed.
Company said , hey our chemicals makes nematodes come out..
Trials proved , hey using MINUTE quantities of chemicals make 90% of nematodes to emerge.
D is my choice
E chemicals ...not emitted..(makes no sense to me) Out.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 05 Jun 2008, 16:50
goalsnr 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 in 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.
- Does not strenghten
(B) The only part of a potato plant that a nematode eats is the roots.
-nematodes just emerge as a result of the chemicals emitted by the roots, after that they might feast on any part of the plant. Out.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
-This will make sense when the pesticide is sprayed while the potatoes have been planted. But the argument says that the plan is to spray them when no potatoes are planted. Out
(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.
-I believe this statement strenghtens the argument by supplanting theoretical data presented with actual results. What if the company is just making claims and results could be opposite. I guess this strenghtens by laying to rest this line of attack.
(E) the chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.
-Does not affect the argument

GIve your reasons for choosing or not choosing B.


I am going with D as well...wats the OA?

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 05 Jun 2008, 17:05
Premise1: Potato cyst nematodes are a pest of potato crops.
Premise2: The nematodes can lie dormant for several years in their cysts, which are protective capsules, and
Premise3: The Nematodes do not emerge except in the presence of chemicals emitted by potato roots.
Premise4: A company that has identified the relevant chemicals in planning to market them to potato farmers to spread on their fields when no potatoes are planted;
Conclusion: any nematodes that emerge will soon starve to death.

(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
This is against conclusion, which says nematodes will die because of starvation. So even if nematodes can be killed by pesticides but this is not strengthening the passage.

(B) The only part of a potato plant that a nematode eats is the roots.
Premise3 implies tells that roots release certain chemicals that make nematodes active. Premise 4 tells company has developed similar chemical and it needs to be spread while there is no potatoes in the field. As this sentence implies if nematodes only eats roots of potato plant. But as this company produced chemical make nematodes active and when they found nothing to eat as potato fields are not ready. So chemical is tricking nematodes. This strengthen the case successfully. Note that this sentence is joining two premises as well as focusing on conclusion so strongest contender.

(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
If at all this will weaken the case. Because bacteria is also present when potatoes are there in the field.

(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.
This is good alternative that tells that 90% of nematodes will come out. But do they die because of starvation how is this strengthening the conclusion.

(E) the chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.
Premise4 says that chemical is spread only when there is no potatoes in field, so this option is irrelevant.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 06 Jun 2008, 07:20
B) The only part of a potato plant that a nematode eats is the roots.
Premise3 implies tells that roots release certain chemicals that make nematodes active. Premise 4 tells company has developed similar chemical and it needs to be spread while there is no potatoes in the field. As this sentence implies if nematodes only eats roots of potato plant. But as this company produced chemical make nematodes active and when they found nothing to eat as potato fields are not ready. So chemical is tricking nematodes. This strengthen the case successfully. Note that this sentence is joining two premises as well as focusing on conclusion so strongest contender.


>>>Abhijit, this was exactly my reasoning when I picked B.But the OA is D. Let me explain.

Nematodes will die when they have no food to eat. The passage says the nematodes come out of the cyst when certain chemicals are emitted by the roots. So B serves as a premise to support the theory that the company can make use of this knowledge to develop a pesticide that will trick the nematodes.However this theory/premise doesnot guarantee the company's plan will be successful. Only D explains why the plan will work.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 06 Jun 2008, 07:20
OA is D

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 13 Feb 2009, 19:58
OA is D, this is from the Paper Test 52.

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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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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Re: Potato cyst nematodes are a pest of potato crops. The nematodes can li [#permalink]

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New post 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 nematodes can li [#permalink]

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New post 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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