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GMATPREP ChallengeQ -Most farmers attempting to control slug

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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug  [#permalink]

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New post 04 Mar 2018, 18:24
GMATNinjaTwo GMATNinja

Can you explain why the answer to Q#1 is not B?

Para 1 summary:
MC and MD: neurotoxins and are harmful even to other species

Para 2 summary:
Alternative: aluminium not good hence scope of additional research.

How safe it is to assert the main purpose of the passage, just on last sentence
as in this.
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug  [#permalink]

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New post 08 Mar 2018, 17:25
adkikani wrote:
GMATNinjaTwo GMATNinja

Can you explain why the answer to Q#1 is not B?

Para 1 summary:
MC and MD: neurotoxins and are harmful even to other species

Para 2 summary:
Alternative: aluminium not good hence scope of additional research.

How safe it is to assert the main purpose of the passage, just on last sentence
as in this.

Quote:
1. In the passage, the author is primarily concerned with

(A) describing the limitations of molluscicides that affect feeding behavior
(B) proposing alternatives to current methods of controlling slugs and snails
(C) emphasizing the need for an alternative to currently available molluscicides
(D) explaining how molluscicides are used to control slugs and snails
(E) criticizing the use of hazardous material for controlling slugs and snails

The author does mention one alternative (aluminum compounds). But the author doesn't actually propose the aluminum idea as a valid solution. Instead, the author describes how it is hazardous to humans and the environment, thus explaining why it is not a safe solution.

So the author doesn't really propose any solutions. And the author certainly does not propose multiple alternatives. Rather, the author suggests that researchers need to come up with better and environmentally safer solutions. Thus, (B) should be eliminated.

The main purpose of a passage is not necessarily the thing that is most discussed in the passage. For example, I might write a letter to a local politician discussing all of the benefits of having green space in cities. I might write 1000 words describing those benefits and then close the letter with, "In conclusion, I would like you to support the new initiative to significantly increase the number of parks in our city."

Most of my letter was about the benefits of green space, but was the purpose of my letter simply to enlighten the politician on the benefits of green space? No. The purpose of my letter was to convince the politician to support the initiative to increase the number of parks.

When thinking about the purpose of each paragraph and of the passage as a whole, you have to ask yourself, "Why is this here? What does the author want me to do/think/believe?" This purpose may well be encapsulated in one little sentence.

I hope that helps!
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug  [#permalink]

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New post 03 Jun 2018, 19:54
Looks like this passage is comparatively an easier one. Got all 4 answers correct.
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug  [#permalink]

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New post 03 Jun 2018, 23:44
PiyushK wrote:
NEW PROJECT!: Back to basic => Give your explanation- Get Kudos Point for best explanation

Passage-01 GMATPrep RCs-Collection(Main article)
Most farmers attempting to control slugs and snails turn to baited slug poison, or molluscicide, which usually consists of a bran pellet containing either methiocarb or metaldehyde. Both chemicals are neurotoxins that disrupt that part of the brain charged with making the mouth move in a coordinated fashion—the "central pattern generator"—as the slug feeds. Thus, both neurotoxins, while somewhat effective, interfere with the slugs' feeding behavior and limit their ingestion of the poison, increasing the probability that some will stop feeding before receiving a lethal dose. Moreover, slugs are not the only consumers of these poisons: methiocarb may be toxic to a variety of species, including varieties of worms, carabid beetles, and fish.

Researchers are experimenting with an alternative compound based on aluminum, which may solve these problems, but this may well have a limited future as we learn more about the hazards of aluminum in the environment. For example, some researchers suggest that acid rain kills trees by mobilizing aluminum in the soil, while others have noted that the human disease Alzheimer's is more prevalent in areas where levels of aluminum in the soil are high. With farmers losing as much as 20 percent of their crops to slugs and snails even after treatment with currently available molluscicides, there is considerable incentive for researchers to come up with better and environmentally safer solutions.
1. In the passage, the author is primarily concerned with

(A) describing the limitations of molluscicides that affect feeding behavior
(B) proposing alternatives to current methods of controlling slugs and snails
(C) emphasizing the need for an alternative to currently available molluscicides
(D) explaining how molluscicides are used to control slugs and snails
(E) criticizing the use of hazardous material for controlling slugs and snails


POE gives the only eligible answer C as others are partly correct or wrong.
2. The author suggests that which of following is true of the "alternative compound" mentioned in the highlighted text?

(A) It is more effective in destroying snails than in destroying slugs.
(B) It begins to affect slugs' feeding behavior before they ingest a lethal dose.
(C) It affects more species of fish than does metaldehyde.
(D) It may not be environmentally safer than methiocarb.
(E) It may be less damaging to trees than metaldehyde.



Alternative compound made up of aluminium (the hazards of aluminum in the environment.)
3. The author cites which of the following as a disadvantage of methiocarb?

(A) It contains high levels of aluminum.
(B) It may react with acid rain to kill trees.
(C) It has been associated with Alzheimer's disease.
(D) It may be toxic to some species of fish. : methiocarb may be toxic to a variety of species, including varieties of worms, carabid beetles, and fish.
(E) It may not be as effective in killing slugs as metaldehyde is.



4. The passage suggests that methiocarb and metaldehyde would be more effective as slug poisons if it were true that they

(A) disrupt the slug's digestive processes rather than its reproductive functions
(B) reduce the slug's ability to taste food
(C) begin to affect the feeding behavior of a slug only after it has ingested a lethal dose : interfere with the slugs' feeding behavior and limit their ingestion of the poison, increasing the probability that some will stop feeding before receiving a lethal dose
(D) reach the central pattern generator more quickly
(E) accumulate only in the central pattern generator rather than throughout the brain


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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug &nbs [#permalink] 03 Jun 2018, 23:44

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