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A company plans to develop a prototype weeding machine that

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A
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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.
Necessary Corrections for Official Guide Verbal Review 2nd Edition Project

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New post 30 Jun 2005, 07:35
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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.

HMTG.

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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 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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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 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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New post 06 Jan 2008, 07:25
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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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.

Last edited by WaterFlowsUp on 14 Oct 2013, 03:28, edited 1 time in total.
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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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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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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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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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New post 08 Sep 2010, 15:52
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 08 Sep 2010, 21:13
karanrajmishra 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.
Greater variation would only make it harder for the machine to distinguish.
B. The shade of color of some plants tends to change appreciably over the course of
their growing season.
Does not help the machine
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.
Distinct colors will the machine more effective.
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 relevant, "when extensive weeding is not necessary"
------------------------------------------------------------------------------------------------------------

Your OA is wrong, this is a OG verbal problem.
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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.

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: A company plans to develop [#permalink]

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New post 24 Jul 2013, 15:02
12bhang 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.

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"


Personally I would read E as:
(E) when extensive weeding is not necessary farm laborers carry out other agricultural duties at times in the growing season .
When they have some "free-time"(not consumed by extensive weeding ) they do other activities.

Read the conclusion once more:
The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

So even if the machine works properly, there are still some activities that requires manual labor, so
"Thus there would still be labor costs even if the need for manual weeding were eliminated"

Your options:
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.
So the machine will reduce labor costs? No. Even if the machine does all the weeding, there are some other activities it cannot do (keep in mind that we do not know if these other activities are minimal so many farmers can be fired, lowering the costs).
What we know for sure is that some activities still requires manual labor, so as the OG says
"Thus there would still be labor costs even if the need for manual weeding were eliminated" and this does not support the claim "will reduce labor costs".

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. [we can't infer something like this]
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