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A company plans to develop a prototype weeding machine that

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Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 51
Page: 137
Difficulty:


A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company's implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.
[Reveal] Spoiler: OA

Last edited by Narenn on 07 Oct 2013, 10:27, edited 6 times in total.
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A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.

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I believe D should be the answer, and here is why

The argument states that the machine will be able to distinguish plants from weeds solely on the differences in the shade of color. D states that plants can be bred to have a distinct shade of color. This means that a plant can be bred with a distinct shade of color that is completely different from that of the weeds. Thus, this development will favor the development of this machine.
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Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.

Tells us nothing about the color of the plants (as we are told, the new technology uses differing colors between crops and weeds). The trap - Eliminate

B. The shade of color of some plants tends to change appreciably over the course of their growing season.

Makes the technology non-efficient. Eliminate

C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.

So what? WE are concerned with the new technology, which uses color to distinguish weeds from crops. WE dont care about manual distinction - Eliminate.

D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.

Straight Answer. Crops can be bred to have distinct colors, which can enable the technology separate crops from weeds.

E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.

We are not concerned about manual processes - Eliminate (irrelevant)


It's a straight (D).
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I would go for E.

E as it makes economic sense to free farm workers from doing de-weeding work,if they can tend to other agricultural duties.

D - I didn't pick D because , genetic engineering is required to see the efficacy of the prototype, which IMO not a strong reason to develop a prototype , and more-over what is the need to change the color of crops , which at present might be distinct from any of the weeds.

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Reasoning: a prototype with optical sensors and microprocessors can distinguish weeds from crop plants by differences in shade of color.

Prethinking:
--> So, the bigger the diff. in shade of color between weeds and crop, the easier it will be for a mashine to distinguish between them.
--> fewer colors of weeds > many colors for the mashine to ba able to distinguish between weeds and crop.

Question Type: Strengthen --> so, new information is appreciated here


Which of the following is a consideration in favor of the company's implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species --> weakens the argument - see the reasoning stated above
B. The shade of color of some plants tends to change appreciably over the course of their growing season --> is it easier for mashine to make a distinction it this case ? NO.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds --> irrelevant. We are concerned about the shade of color. Actually, it's a weakener.... more factors that must be distiguished by the mashine.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics --> CORRECT. Distinctive shade of color makes it easier for the mashine to make such distinction.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary --> irrelevat. "Zero" information about the mashines and a distinction....
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A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company's implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species. - Variation in shades of color weakens the conclusion.
B. The shade of color of some plants tends to change appreciably over the course of their growing season - Same as A
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds. - When considering prototype machine, manual weeding should not come into picture. Weakens the solution.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics. - Prototype machine will easily remove distinctive single color weed from crop. Strengthen the conclusion.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary. - This is just an assumption.


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Re: A company plans to develop a prototype weeding machine that [#permalink]

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okdongdong wrote:
Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 51
Page: 137
Difficulty:


A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company's implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.


the main point - machine will be able to distinguish between weeds and crops.

A - tells about shades of color between different species of WEEDS. not really helping. if the weeds had different colors than the crops, then yes, it would have been the right answer.
B - not helping but rather weakening the claim. it might be the case that the machine will cut the crops.
C - what are the criterion to distinguish between crops and weeds is out of scope.
D - yes...if this can be done, then we can give a specific color to the crops..and the remaining colors would be cut by the machine..so less weeds..looks good.
E - what laborers do - is out of scope.
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a constant pattern in colour change, on that ground it will distingush weed from crop plants. - this is only thing that is supporting it.

A. There is a considerable degree of variation in shade of color between weeds of different species. weaken it.
B. The shade of color of some plants tends to change appreciably over the course of their growing season. not supportive for sure.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds. - weaken it.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics. - machine is actually based on this fact only.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary. - weaken it.
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New post 01 Jul 2005, 01:07
I would go for C as it is the only choice which would favour the company's decision to develop the prototype.

A fails because it does not favor co. as it makes the comparison between crops and weeds difficult
B fails as the machine still wont be able to distinguish between crops and weeds
D fails because it is out of the scope.
E. unnecessary information..!
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New post 01 Jul 2005, 23:01
i go with D

A. is weakining company proposed implementation. Diferencies in color of diferent species will not allow this equipment to work correctly.
b. is the same as above
c. is weakining because it is showing us that there is other common technic to distinguish weeds from crop.
d is out of scope
e. is giving some justification to implement this equipment

what is OA?
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New post 01 Nov 2006, 09:29
A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.
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New post 01 Nov 2006, 22:36
I would go for D too.

A. Weeds come in different shades does not in any way support the ability to differentiate b/w crop and weed.
B. Doesn't necessarily support it
C. Goes against the statement
D. Genetic modification of crops to have the same shade leads to standardization that will enable differentiating b/w crops and weeds
E. Out of scope
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New post 01 Nov 2006, 22:46
D

A. There is a considerable degree of variation in shade of color between weeds of different species.
- irrelevant. We are concerned with the difference between shades of crops and weeds, not just between the weeds.

B. The shade of color of some plants tends to change appreciably over the course of their growing season.
- weakens.

C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
- irrelevant.

D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
- CORRECT. Provides a perfect explanation as to how the new technology could be really useful.

E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.
- irrelevant.
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A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by
differences in shade of color. The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

A. There is a considerable degree of variation in shade of color between weeds of different species.
B. The shade of color of some plants tends to change appreciably over the course of their growing season.
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary
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Re: question to solve(1) [#permalink]

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New post 24 Aug 2009, 13:48
I like D

With this question type we don't look to strengthen or weaken an argument but find a suitable match for one of the facts. The fact here is that the machine will pick weed over crop based on plant shade.

A - This could be a problem as programming the shades of all the weeds could also be the shade of a crop
B - See A - problem
C - Problem as it indicates weed vs crop is a size issue not a colour issue
E - Not really important to the overall fact pattern.

D - Compliments crop can be a different colour than the weeds around!
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Re: prototype weeding machine [#permalink]

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New post 24 Aug 2009, 17:54
D, as the other choices weakens it...

A. There is a considerable degree of variation in shade of color between weeds of different species. -variation in color of weeds weakens...
B. The shade of color of some plants tends to change appreciably over the course of their growing season. -same as A
C. When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds. -not related
D. Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics. -best.
E. Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary. -not related
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Re: prototype weeding machine [#permalink]

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New post 28 Aug 2009, 07:39
I will go with A.
The reason is: If weeds come in various shades of green color,for example, it may be easy to pick out light green shade as weeds when compared to dark green shade of crops, by the naked eye, but it may not be that easy to pick out dark shade of green weeds from dark shade of green crops; according to the stimulus, the machine can do just that. So, it supports the use of a weeding machine.
D on the other hand, weakens the argument. If crops and weeds have distinctive different colors, then you may not need an optical microprocessor to do the job. Even the naked eye could do the job as well.
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Re: prototype weeding machine [#permalink]

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New post 04 Jan 2010, 17:15
rkassal wrote:
I will go with A.
The reason is: If weeds come in various shades of green color,for example, it may be easy to pick out light green shade as weeds when compared to dark green shade of crops, by the naked eye, but it may not be that easy to pick out dark shade of green weeds from dark shade of green crops; according to the stimulus, the machine can do just that. So, it supports the use of a weeding machine.
D on the other hand, weakens the argument. If crops and weeds have distinctive different colors, then you may not need an optical microprocessor to do the job. Even the naked eye could do the job as well.


Your reasoning is not correct , I guess. Question asks for the consideration of why company plan to develop a machine that can distinguish between weeds and corps using the differences in shade of color. Choice A does not speak anything about corp plants. So choice a does not say anything in favor of companies plan.

Choice D speaks in favor of the companies plan - it says that any plant can be given a new distinct shade of color economically without changing its other characteristics. This is in favor of the companies plan to develop a machine that can distinguish weeds from corp plants using differences in color.
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Re: prototype weeding machine [#permalink]

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New post 25 Mar 2010, 06:51
I think a very important thing to eliminate wrong answers is to find the irrelevant ones:

(A) the original subject didnt even mention about "different species" of crop plants. its irrelevant.

(B) the change of color is irrelevant and indirect to the company's plans

(C) actually i was really stuck in this answer. cuz i thought that if people had to take all those things besides shade of color into consideration, then they had to spend more time on distinguishing the plants. and i considered it the reason why the company emphazised on the advantage of machine use.

(D) i dont know how to say about D..cuz i chose C

(E) whether farm laborers are busy with other business at other time is not relevant.
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Re: prototype weeding machine   [#permalink] 25 Mar 2010, 06:51

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