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A company plans to develop a prototype weeding machine that

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

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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.

Originally posted by okdongdong on 26 Jun 2005, 05:31.
Last edited by Bunuel on 20 Jun 2018, 01:51, edited 7 times in total.
Necessary Corrections for Official Guide Verbal Review 2nd Edition Project
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Re: CR- Verbal Review 2nd ed question 51  [#permalink]

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New post 19 Nov 2013, 18:48
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The weeding machine works to eliminate weeds based on color. It needs to distinguish the color of the weeds from those of other plants. Answer choice D states that basically any plant can be made to have a distinctive color. This ensures that these plants could be bred to have a color that the machine recognizes as NOT being a weed, and thus does not destroy the plant. This increases the effectiveness of the weeding machine by allowing it to work in areas with virtually any kind of plants.

I hope this helps!!!
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Re: A company plans to develop a prototype weeding machine that  [#permalink]

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New post 09 Jul 2005, 14:52
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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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New post 30 Jun 2005, 07:09
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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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New post 23 Mar 2012, 15:30
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I have chosen D for this question:

It sounds like nobody posted the OA - it is D. This question is #51 in Verbal 2nd Edition.

This passage states that an inventor created a machine that would replace manual weeding, thereby reducing the labor costs.

A. This would actually weaken the argument. The reason is because if there is a large degree of variation in shade of color between weeds, it would be very tough for the machine to differentiate.

B. Again, this weakens the argument. If the color of some plants change over the course of the season, this would make it difficult for the machine to differentiate between a plant and a weed.

C. This describes something that the machine would not be able to do. Therefore, it weakens the argument.

D. This would support the argument. The reason is because manipulation of plants to a certain shade of color would allow the machine to be much more efficient. For example, if we manipulated the plants to be only dark green, then it becomes much easier for the machine to differentiate between plants and weeds.

E. This statement is irrelevant. Also, it suggests that labor costs would not be reduced because there are other agricultural duties that require attending.
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Re: A company plans to develop a prototype weeding machine that  [#permalink]

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New post 24 Jul 2013, 10:17
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1
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.

I wanted to ask about the role of choice E.
" farm ppl who are responsible for manual weeding work on other agricultural activities during the season when extensive weeding is not required.This could mean 2 things:
a) they have other activities that they can perform during the weeding season . Instead of manually weeding out the weeds, they can perform these other activities. So, the cost of hiring the others for these activities can be saved.

b ) these activities that farm labourers responsible for weeding perform during the season when weeding is not required can only be performed during that particular season. If so, the farm labourers can be relieved during the actual weeding season,thus saving on the costs.

explanation in OG vr2 says : This does not favor the company’s implementing the plan to develop the machine. There would
still be tasks other than weeding that would require hiring staff . Thus there would still be labor
costs even if the need for manual weeding were eliminated"
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Re: CR- Verbal Review 2nd ed question 51  [#permalink]

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New post 24 Dec 2013, 23:03
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Its not actually a strengthen question. It asks us to choose an option that supports the implementation of the plan by the company. The company's plan is to develop the prototype not to reduce labour costs.
Hence the option we are seeking should say,"Ok, its good to go ahead with the plan."
Now just look at D) which says "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".
The machine operates by first distinguishing the color and then cutting the weeds which have a different shade.
Option D) clearly helps us to believe that if distinctive shade of color is possible without altering any other characteristics then the machine can very much be put to use. Hence the company should go ahead with its plan to develop the machine.
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New post 27 Feb 2015, 02:25
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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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New post 16 Mar 2016, 17:43
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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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New post 27 Jun 2016, 18:55
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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 27 Nov 2016, 02:36
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Option 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 argument says that the machine helps reduce labor costs.

First, when extensive weeding is necessary, the usage of m/c might help the case. We aren't sure. The option doesn't talk about any advantage the company might have in implementing a prototype of such a machine.
Second, when there isn't extensive weeding required, the farm laborers are already involved in other activities. In such a case, the machine will not help in reducing costs.

I hope this clears it herbgatherer
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New post 10 May 2018, 16:09
GMATNinja VeritasPrepKarishma

I would like to know what is it that a student misses to get to OA
in such HARD questions apart from skimming through the argument.

Goal of plan: To develop a prototype that makes clear difference between weeds and plants on basis of differences in shades of color.

Q type: I need to strengthen the implementation of above plan.

Quote:
(A) There is a considerable degree of variation in shade of color between weeds of different species

Nope we need to chop off weeds from plants, different types of weeds are not my areas of concern

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

It says shades of some plants change drastically ie in a large extent during the span of their growth.
So it does help new prototype machine to chop of plants from weeds.

Quote:
(C) When crops are weeded manually, overallsize and leaf shape are taken into account in distinguishing crop plants from weeds.

No mention how difference in color is useful in chopping off plants from weeds.

Quote:
(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.

As per me, the biggest reason missing out on this is: no mention of automatic weeding machine in OA, but I had to infer fair amount
of understanding from argument to link how selection and genetic changing of almost a large number of plants to allow to have
an unique shade of color of each plant from one another . At least I could not infer to such an understanding level under time pressure.
What is the correct way of approach here?

Quote:
(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.

Totally out of scope
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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.

Question type: Strengthen

Known Information:
A prototype weeding machine to eliminate the need for manual weeding. This is classic Man vs Machine argument.

Supporting statement: Company claims that the machine distinguishes weeds from crops using difference in shade of color.

So anything that would make this differentiation would weaken company's claims. Now lets see the options

(A) There is a considerable degree of variation in shade of color between weeds of different species - This will make the job of the machine difficult.

B) The shade of color of some plants tends to change appreciably over the course of their growing season - If the color changes , will the machine keep up the with the changes ? Another challenge for the machine.

(C) When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds - Huh we considered only the color differentiation here - This definitely weakens.

(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 - This sounds good. Only differentiation is based on color which ideally suits the machine's work - Lets hold on to this option for now.

(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 - Out of scope for the question here.

D is the promising option here

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

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New post 11 May 2018, 12:34
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adkikani wrote:
GMATNinja VeritasPrepKarishma

I would like to know what is it that a student misses to get to OA
in such HARD questions apart from skimming through the argument.

Goal of plan: To develop a prototype that makes clear difference between weeds and plants on basis of differences in shades of color.

Q type: I need to strengthen the implementation of above plan.

Quote:
(A) There is a considerable degree of variation in shade of color between weeds of different species

Nope we need to chop off weeds from plants, different types of weeds are not my areas of concern

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

It says shades of some plants change drastically ie in a large extent during the span of their growth.
So it does help new prototype machine to chop of plants from weeds.

Quote:
(C) When crops are weeded manually, overallsize and leaf shape are taken into account in distinguishing crop plants from weeds.

No mention how difference in color is useful in chopping off plants from weeds.

Quote:
(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.

As per me, the biggest reason missing out on this is: no mention of automatic weeding machine in OA, but I had to infer fair amount
of understanding from argument to link how selection and genetic changing of almost a large number of plants to allow to have
an unique shade of color of each plant from one another . At least I could not infer to such an understanding level under time pressure.
What is the correct way of approach here?

Quote:
(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.

Totally out of scope

As you mentioned, the key is being able to differentiate between weeds and plants based ONLY on differences in shade of color.

All we know from (B) is that some plants will change color. We don't know whether that will make it easier or harder for the machine to differentiate between weeds and plants. It might somehow make it easier but it also might not (i.e. perhaps the machine will have a hard time keeping track of the plants if their colors are constantly changing). Without further information, we can't tell whether (B) would hurt or help, so it must be eliminated.

(D) specifically tells us that we could use selection and genetic manipulation to give virtually ANY plant a a distinctive (i.e. unique) shade of color. If every plant has a distinctive color, then it will be easy for the machine to identify the plants based on color alone. This clearly helps, so (D) is the best answer.

Sakshij0694 wrote:
mikemcgarry GMATNinja
I am down to A and D and i find A more convincing then D to choose.

Please help me with this.
I invented a machine which differentiates Tshirts on the basis of color and helps me to pick one.
Now the more degree of variation of color, more will be the efficiency of the machine to choose correctly.

Example - I want a red shirt and the pool contains Red - Blue - Black which all are vibrant colors and easy to differentiate from.
However, If the pool contains Magenta,Purple, Dark Purple which narrows are variation of colors and this will lead to a subtle difference in choosing of an Tshirt for the machine and this will be a problem for the machine.
How to choose?

The same is the case for this machine here.

Thanking in advance.

Sakshij0694, sorry for the delay...

(A) only talks about the color variation among weeds, not the color variation between weeds and plants.

(A) only tells us that there is wide range of colors among weeds. That does not necessarily mean that the weeds colors are all distinctive and easy to differentiate (i.e. there still might be several shades close to purple, several shades close to orange, several shades close to green, etc.). In other words, having a wide range does not necessarily mean that weeds can be divided into a few discrete, easily separable color groups.

More importantly, it doesn't tell us anything about weeds vs plants. Is it easy to differentiate the weeds from the plants? Maybe the wide range of weed colors actually makes the machine's job harder... if there is a wide range of weed colors and a wide range of plant colors, the machine might not be able to tell which is which. We might have red, blue, and black weeds and also red, blue, and black plants. This would obviously make it harder for the machine.

I hope that helps!
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New post 21 Oct 2018, 20:46
Official Answer:

okdongdong wrote:

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.


Evaluation of a Plan

Situation A company plans to develop an automated weeding machine that would distinguish weeds from crop plants by differences in shade of color. It is supposed to reduce labor costs by eliminating the need for manual weeding.

Reasoning Which option describes a consideration that would favor the company's plan? The passage supports the plan by claiming that the machine would reduce labor costs by virtually eliminating weeding by hand. The correct option will be one that adds to this support. Labor costs will be reduced only if the machine works well. The machine relies on shade of color to distinguish between weeds and crop plants. If crop plants can be bred to have distinctive color without sacrificing other qualities, it would be more likely that the machine could be used effectively.

Option D is Correct. Making crop plants easily distinguishable from weeds would facilitate the effective use of the weeding machine.

Why are A, B, C & E wrong?

A- Greater variation among weed plants would make it more difficult for the machine to distinguish between weeds and crop plants, and this would make it less likely that the machine would be effective.

B- This option tends to disfavor the effectiveness of the machine. The more changeable the colors of the plants to be distinguished, the more complex the task of distinguishing between weeds and crop plants based on their color.

C- This option tends to disfavor the likely benefits of the machine because it indicates that manual weeding distinguishes weeds from crop plants by using criteria that the machine does not take into account. If the machine does not distinguish weeds from crop plants as accurately and reliably as manual weeding does, then the machine is less apt to make manual weeding unnecessary.

E- This does not favor the company's implementing the plan to develop the machine. There would still be tasks other than weeding that would require hiring staff. Thus there would still be labor costs even if the need for manual weeding were eliminated.
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A company plans to develop a prototype weeding machine that &nbs [#permalink] 21 Oct 2018, 20:46
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