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GMATPREP ChallengeQ -Most farmers attempting to control slug

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GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 12 Aug 2014, 02:51
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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 consider able 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
[Reveal] Spoiler:
C


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.
[Reveal] Spoiler:
D


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.
E. It may not be as effective in killing slugs as metaldehyde is.
[Reveal] Spoiler:
D


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
D. reach the central pattern generator more quickly
E. accumulate only in the central pattern generator rather than throughout the brain
[Reveal] Spoiler:
C


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Last edited by PiyushK on 16 Aug 2014, 01:57, edited 4 times in total.
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 13 Aug 2014, 20:24
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 15 Aug 2014, 01:05
Time taken 4:20 mins.
1. In the passage, the author is primarily concerned with
C. emphasizing the need for an alternative to currently available molluscicides
Final note from author in Para2."there is consider able incentive for researchers to come up with better and environmentally safer solutions."

2. The author suggests that which of following is true of the "alternative compound" mentioned in the highlighted text?
D. It may not be environmentally safer than methiocarb.
"
PAra1: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.
Para2:as we learn more about the hazards of aluminum in the environment"

3. The author cites which of the following as a disadvantage of methiocarb?
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."

4.The passage suggests that methiocarb and metaldehyde would be more effective as slug poisons if it were true that they
C. begin to affect the feeding behavior of a slug only after it has ingested a lethal dose
"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"
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 15 Aug 2014, 20:40
4 mins 54 secs

1. B
2. D
3. D
4. C
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 16 Aug 2014, 01:51
Around 5 mins..All correct

Read whole passage,including details
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Re: GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 30 Aug 2014, 10:13
pande londiya to hum le ke he jae ge .......................
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GMATPREP ChallengeQ -Most farmers attempting to control slug [#permalink] New post 21 Oct 2014, 13:36
Time taken: 4:15

1. In the passage, the author is primarily concerned with
A. describing the limitations of molluscicides that affect feeding behavior --> WRONG. Not the primary concern of the passage
B. proposing alternatives to current methods of controlling slugs and snails --> WRONG. Just mentions an alternative is needed but does not propose/describe in detail.
C. emphasizing the need for an alternative to currently available molluscicides --> CORRECT.
D. explaining how molluscicides are used to control slugs and snails --> WRONG. Not the primary concern of the passage
E. criticizing the use of hazardous material for controlling slugs and snails --> WRONG. The main purpose is not criticizing, but suggesting/recommending something.

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. --> CORRECT. The first sentence of the second passage mentions.
E. It may be less damaging to trees than metaldehyde.

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. --> CORRECT. The last sentence of the first passage mentions.
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 --> CORRECT.
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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GMATPREP ChallengeQ -Most farmers attempting to control slug   [#permalink] 21 Oct 2014, 13:36
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