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weeding machine

by arorag » Sat Jul 12, 2008 8:50 pm
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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by reachac » Sat Jul 12, 2008 9:07 pm
IMO D
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by raunekk » Sat Jul 12, 2008 11:26 pm
"Selection and genetic manipulation " can help to bred plants in a "distinctive shade of color" which can thus be helpful to "prototype weeding machine"..


IMO:D

OA??
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by agent47 » Sun Jul 13, 2008 9:25 pm
IMO D
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by gmat620 » Sun Mar 15, 2009 10:46 am
OA:D...but why not A, B, or C...they are of consideration for company. aren't they ?
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by S0laris » Sun Mar 15, 2009 2:35 pm
gmat620 wrote:OA:D...but why not A, B, or C...they are of consideration for company. aren't they ?
question asks to find assumption, without which one machine is inapplicable
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by akhpad » Sun Mar 28, 2010 8:45 pm
A - talk about only weeds
D - talk about only plants

We need to distinguish between weeds and plants.

Can someone explain why D is correct? What is the problem with A.

It would be highly appreciated.
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by ssgmatter » Wed May 26, 2010 7:14 am
arorag 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.
Can anyone please explain this one in more details?...
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by paes » Wed May 26, 2010 9:28 pm
akhp77 wrote:A - talk about only weeds
D - talk about only plants

We need to distinguish between weeds and plants.

Can someone explain why D is correct? What is the problem with A.

It would be highly appreciated.
The assumption is that the weed color should be different from crop color, then only the machine will be successful.
D : is saying that we can create plants of distinctive color. So it means we can create crops with different color that that of weed.

A : is saying only about the colors of weeds.
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by kevincanspain » Wed May 26, 2010 11:22 pm
arorag 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.
A is actually a cause for concern. If weeds come in different colors, some weeds may be the same color as the desirable plants.
B poses a similar problem for the machine: if weeds change color, the machine may have trouble distinguishing between weeds and plants on the basis of color.
C is irrelevant as long as differences in color allow the machine to reliably tell weeds apart from plants.
D indicates that plants can be made to have a colour that is different from those of weeds, meaning that the machine can rely on its criteria to work properly.
E is irrelevant
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by akhpad » Wed May 26, 2010 11:25 pm
akhp77 wrote:A - talk about only weeds
D - talk about only plants

We need to distinguish between weeds and plants.

Can someone explain why D is correct? What is the problem with A.

It would be highly appreciated.
I got it now.
A: There is a considerable degree of variation in shade of color between weeds of different species.
=> Here, we cannot control intensity of color. it might be much high and low. It would be difficult.

D: we can make distinctive amount of variation in color by making changes in genetics without altering any other characteristics. Here, things in our control. We can adjust accordingly.

OA: D
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by paddle_sweep » Fri Jul 09, 2010 11:11 pm
kevincanspain wrote:
arorag 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.
A is actually a cause for concern. If weeds come in different colors, some weeds may be the same color as the desirable plants.
B poses a similar problem for the machine: if weeds change color, the machine may have trouble distinguishing between weeds and plants on the basis of color.
C is irrelevant as long as differences in color allow the machine to reliably tell weeds apart from plants.
D indicates that plants can be made to have a colour that is different from those of weeds, meaning that the machine can rely on its criteria to work properly.
E is irrelevant
Hi Kevin, Could you please indicate as to why 'E' is irrelevant here?
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by paes » Sat Jul 10, 2010 8:22 pm
I would also like to know why E irrelevant.

If farmers are busy then it gives us one more reason to use the machine.
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by reply2spg » Tue Jul 13, 2010 8:34 pm
Here we have to personalize the argument. Consider yourself as a company representative. You have launched one product say weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color. There is no way to differentiate, other than color, between weed and actual plant. To be successful in the market I will pray that there should be some method which changes the color of other plants, other than weed. If I find out some mechanical method which changes only color of the plant and not any other characteristic, then that method will be helpful for my business. Same has mentioned in option D. Therefore, option D is correct.
arorag 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.
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by ankurmit » Wed Jul 21, 2010 1:20 am
A is actually a cause for concern. If weeds come in different colors, some weeds may be the same color as the desirable plants.
B poses a similar problem for the machine: if weeds change color, the machine may have trouble distinguishing between weeds and plants on the basis of color.
C is irrelevant as long as differences in color allow the machine to reliably tell weeds apart from plants.
D indicates that plants can be made to have a colour that is different from those of weeds, meaning that the machine can rely on its criteria to work properly.
nice explanation ..But can you expain me the what is meaning of this line and what does author intent to ask?

Which of the following is a consideration in favor of the company�s implementing its plan to develop the prototype?
--------
Ankur mittal
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