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Most farmers attempting to control slugs and snails turn to baited slu

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Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post Updated on: 30 Jul 2019, 04:28
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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



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.



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.



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



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Originally posted by PiyushK on 12 Aug 2014, 03:51.
Last edited by SajjadAhmad on 30 Jul 2019, 04:28, edited 12 times in total.
Updated complete topic (42).
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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 21 Oct 2014, 14:36
7
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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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 15 Aug 2014, 02:05
3
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: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 23 Jan 2015, 23:35
3
Though all the answers are correct but took 12:08 Mins to solve.
Here is my analysis:
Topic: use of pesicides
P1- cites a problem and explains how the poison works. At the end comes the important point that other insect also get affected by it --> So it triggers --> the next paragraph will either provide a solution of this problem or criticize the use of the poison. Let's continue reading the second para.
P2- Provides alternative of the poison but with a limitation and other drawbacks.
Author seems a scientist who also focus on the Env aspect of the research.
----
The passage seems easy and most of the answer choices were out -of-scope, so easy to be eliminated.


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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 26 Sep 2015, 20:09
4
Hello Steinbeck,

Refer to the following lines from the passage:
"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."

The statement tells us that the neurotoxins may not be effective ,as some slugs will stop feeding before intake of a lethal dose.

The question talks on how to make neurotoxins more effective?
Pre-Thinking :Neurotoxins will be more effective if they impact the feeding behavior only after the slugs have received a lethal dose

Now Look at the answer choices:
[A] is not mentioned in the passage
[B] If the slugs ability to taste food is reduced then it will not take a lethal dose of neurotoxin so neurotoxins effectiveness will be reduces further.
[C] Makes Sense. This is the expected behavior.
[D] Same problem as option choice B. If neurotoxins reach the central pattern generator more quickly slugs may not intake a lethal dose. The effectiveness of the poison will be reduced farther.
[E] Passage does not mentions anything which will make neurotoxins more effective if they are accumulated only in the Central pattern generator
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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 26 Aug 2016, 01:00
Took 4 mins 20 seconds , including 2 mins to read the passage .
This is by far one of the easiest GMAT RC passage ever :)

-The author is not stating an opinion
- The author is discussing efforts that have been made to reduce slug population
-The author believes that there is more that can be done to ensure good control of slug population

1."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."
Answer C

2.
"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."
Answer D

3.
"methiocarb may be toxic to a variety of species, including varieties of worms, carabid beetles, and fish."
Answer D

4.
"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."
Answer C
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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#permalink]

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New post 14 Sep 2016, 23:50
1
1. In the passage, the author is primarily concerned with
C. emphasizing the need for an alternative to currently available molluscicides
" there is consider able incentive for researchers to come up with better and environmentally safer solutions"
D. explaining how molluscicides are used to control slugs and snails
In the 1st paragraph author shows how molluscicides are used to control slugs and snails. In that author also writes about the negative impact that mollusciscides have. In the next paragraph, author talks about an alternative compund and the probable negative impact the alternative compund has.
E. criticizing the use of hazardous material for controlling slugs and snails
Author is not criticizing. He is citing the negative impact mollusciscides have and why alternative to mollusciscides is required : 1. farmers are losing as much as 20 percent of their crops to slugs and snails even after treatment with currently available molluscicides and 2. Mollusciscides have negative impact
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Re: Most farmers attempting to control slugs and snails turn to baited slu  [#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: Most farmers attempting to control slugs and snails turn to baited slu  [#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: Most farmers attempting to control slugs and snails turn to baited slu   [#permalink] 08 Mar 2018, 17:25
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