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# Paper lice feed on microscopic spores of a certain fungus that grows p

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Manager
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Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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Updated on: 11 Apr 2019, 01:53
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Question Stats:

31% (02:12) correct 69% (02:16) wrong based on 470 sessions

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Paper lice feed on microscopic spores of a certain fungus that grows primarily in damp areas; when these fungal spores are present on the pages of a book, the paper lice will also ingest the paper comprising the pages unless the paper is treated with insecticide. However, many rare and valuable books are too fragile to be treated with insecticide. Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice.

The argument depends on which of the following assumptions?

A. Paper lice can be prevented from entering an area that is being dehumidified.

B. Treating rare books with insecticide will cause more significant damage than that caused by paper lice.

C. After the fungus has been eliminated, fungal spores do not remain in any significant quantity.

D. It is possible to store rare books in a dry environment without causing the pages to become brittle and crack.

E. No other insects, aside from paper lice, typically feed on the paper used to create books.

Originally posted by rish2708 on 11 Apr 2019, 01:29.
Last edited by Bunuel on 11 Apr 2019, 01:53, edited 1 time in total.
Renamed the topic.
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 02:05
Hello Experts,
My query to the question is:

How are we ruling option C over option A?
As per Option C:
Currently there are 10000 fungal spores on the books
We dehumidify the environment and save the books in that environment.
As per Option C ( OA) - this will reduce the fungal spores to say 10 ( reduce in significant quantity)
Then, also the Paper Lice can eat the pages right?
See this part of the passage:
" when these fungal spores are present on the pages of a book, the paper lice will also ingest the paper comprising the pages unless the paper is treated with insecticide"

I thought option A connects dehumidification perfectly to Paper Lice and hence I chose that.

Kindly throw some light on the subtlety of difference between A and C.

Regards,
Rishav
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 02:43
Please Explain why D cannot be correct?
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 03:01
2
Sneha333 wrote:
Please Explain why D cannot be correct?

D can't be an answer because the argument exclusively is about protecting the books from Paper Lice.
Whether they would go brittle or get torn apart does not address the concern that they will be protected from Paper Lice
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 04:54
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Not an expert, but agreed that it is down to A and C. But look at the main part of the argument: "risking damage from paper lice". What do lice do? They feed on fungal spores and fungus grows in damp areas. Accordingly, it is not a case of simply reducing the fungus, but rather eradicating it completely. The risk is therefore still there. This answer is better as it deals with the passage as a whole, including the argument and the premise. 'A' only deals with the lice - but what is the lice can fly in and there is no fungus? They would present no danger whatsoever.
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 04:59
medic19 wrote:
Not an expert, but agreed that it is down to A and C. But look at the main part of the argument: "risking damage from paper lice". What do lice do? They feed on fungal spores and fungus grows in damp areas. Accordingly, it is not a case of simply reducing the fungus, but rather eradicating it completely. The risk is therefore still there. This answer is better as it deals with the passage as a whole, including the argument and the premise. 'A' only deals with the lice - but what is the lice can fly in and there is no fungus? They would present no danger whatsoever.

I agree to this point but option C says reduce the fungus spores significantly, it's not over.
So, then also these Lices can attack right? The situation seems still vulnerable.

What I perceived was that if dehumidification is there Lices won't enter and obviously fungus would decrease because they grow only in dampened areas.

Regards,
Rishav
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Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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11 Apr 2019, 05:20
rish2708 wrote:
medic19 wrote:
Not an expert, but agreed that it is down to A and C. But look at the main part of the argument: "risking damage from paper lice". What do lice do? They feed on fungal spores and fungus grows in damp areas. Accordingly, it is not a case of simply reducing the fungus, but rather eradicating it completely. The risk is therefore still there. This answer is better as it deals with the passage as a whole, including the argument and the premise. 'A' only deals with the lice - but what is the lice can fly in and there is no fungus? They would present no danger whatsoever.

I agree to this point but option C says reduce the fungus spores significantly, it's not over.
So, then also these Lices can attack right? The situation seems still vulnerable.

What I perceived was that if dehumidification is there Lices won't enter and obviously fungus would decrease because they grow only in dampened areas.

Regards,
Rishav

You shouldn't "perceive" (by that I imagine you mean "deduct"/"understood that"), but just take what is provided in the passage. The connection between lice and dampness is only an indirect one but we do not know if such a condition affects their habits.
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11 Apr 2019, 11:30

Can you please throw some light on it?
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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16 Apr 2019, 22:56
rish2708 wrote:
Sneha333 wrote:
Please Explain why D cannot be correct?

D can't be an answer because the argument exclusively is about protecting the books from Paper Lice.
Whether they would go brittle or get torn apart does not address the concern that they will be protected from Paper Lice

Dehumidifying won't do any harm to the books - isn't it an assumption?
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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17 Apr 2019, 04:13
ArupRS wrote:
rish2708 wrote:
Sneha333 wrote:
Please Explain why D cannot be correct?

D can't be an answer because the argument exclusively is about protecting the books from Paper Lice.
Whether they would go brittle or get torn apart does not address the concern that they will be protected from Paper Lice

Dehumidifying won't do any harm to the books - isn't it an assumption?

Quote:
Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice.

This argument is about a plan. The plan is to store the books in a dehumidifying environment. The assumption you state in a way is already stated.
And whether they go brittle is not required for us to know. We need to check the soundness of the plan.

Regards,
Rishav
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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17 Apr 2019, 18:11
2
rish2708 wrote:
Paper lice feed on microscopic spores of a certain fungus that grows primarily in damp areas; when these fungal spores are present on the pages of a book, the paper lice will also ingest the paper comprising the pages unless the paper is treated with insecticide. However, many rare and valuable books are too fragile to be treated with insecticide. Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice.

The argument depends on which of the following assumptions?

A. Paper lice can be prevented from entering an area that is being dehumidified.

B. Treating rare books with insecticide will cause more significant damage than that caused by paper lice.

C. After the fungus has been eliminated, fungal spores do not remain in any significant quantity.

D. It is possible to store rare books in a dry environment without causing the pages to become brittle and crack.

E. No other insects, aside from paper lice, typically feed on the paper used to create books.

chetan2u
mikemcgarry
GMATNinja

Can you pls check my explanation...
If you negate option A , it become s "Paper lice can not be prevented from entering an area that is being dehumidified."
Then also the conclusion "Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice. "
can follow. What if there are no fungal spores left in the area which paper lice can feed on ? Then paper lice may not thrive and the rare books can be stored without risking damage from paper lice .
The conclusion can follow after negating assumption. So A is not correct.

If option C is negated , it becomes "After the fungus has been eliminated , the fungal spores remain in significant quantity."
Then the conclusion "Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice. "
can not follow. Because even after de humidification , fungal spores can remain in significant quantity and that may allow paper lices to feed on fungal spores and the conclusion i.e books can be stored without risking damage " may not follow.
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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18 Apr 2019, 00:13
1
sayan640 wrote:
rish2708 wrote:
Paper lice feed on microscopic spores of a certain fungus that grows primarily in damp areas; when these fungal spores are present on the pages of a book, the paper lice will also ingest the paper comprising the pages unless the paper is treated with insecticide. However, many rare and valuable books are too fragile to be treated with insecticide. Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice.

The argument depends on which of the following assumptions?

A. Paper lice can be prevented from entering an area that is being dehumidified.

B. Treating rare books with insecticide will cause more significant damage than that caused by paper lice.

C. After the fungus has been eliminated, fungal spores do not remain in any significant quantity.

D. It is possible to store rare books in a dry environment without causing the pages to become brittle and crack.

E. No other insects, aside from paper lice, typically feed on the paper used to create books.

chetan2u
mikemcgarry
GMATNinja

Can you pls check my explanation...
If you negate option A , it become s "Paper lice can not be prevented from entering an area that is being dehumidified."
Then also the conclusion "Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice. "
can follow. What if there are no fungal spores left in the area which paper lice can feed on ? Then paper lice may not thrive and the rare books can be stored without risking damage from paper lice .
The conclusion can follow after negating assumption. So A is not correct.

If option C is negated , it becomes "After the fungus has been eliminated , the fungal spores remain in significant quantity."
Then the conclusion "Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be stored without risking damage from paper lice. "
can not follow. Because even after de humidification , fungal spores can remain in significant quantity and that may allow paper lices to feed on fungal spores and the conclusion i.e books can be stored without risking damage " may not follow.

Yes, this is perfectly correct.
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Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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23 Jun 2019, 01:34
Conclusion: Dehumidifying the environment to minimize dampness will allow rare books that cannot be treated with insecticide to be "stored" "without risking damage" from paper lice.

Evidence/Premise:
1 Paper" lice" feed on microscopic "spores" of a certain fungus that grows primarily in "damp" areas;
2 these fungal "spores" are present on the pages of a book, the paper lice will also ingest the paper comprising the pages unless the paper is treated with insecticide.
3 "rare" and valuable books are too fragile to be treated with insecticide.

Pre Assumption : Dehumid will allows the 1.spore not to grow and 2.kill the lice/fungi 3.Dehumid can work in damp area 4.remove risk of storage

situation: Humid-> Spore -> Lice -> paper eaten -> induce risk of storage

A. Paper lice can be prevented from entering an area that is being dehumidified.
1, Half-answered solution, ok, so the lice has been prevented , but the spore remains, then lice comes, and prevent ... repeated vicious cycle... problem not solve....
(no gap closed, this only talks about the conclusion, what closes the gap and the evidences/premises? )
2,Negate: paper lice cannot be prevented
(how about the spore, and the risk of storage? the conclusion asking to attack store and spore)

C. After the fungus has been eliminated, fungal spores do not remain in any significant quantity.
1, OK, spore eliminated, most likely won't attract lice.
2, Negate: After fungi eliminated, fungi spore remain significant
( This answered the gap, since conclusion asking to attack store and spore )
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Re: Paper lice feed on microscopic spores of a certain fungus that grows p  [#permalink]

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30 Jun 2019, 03:49
The dehumidifying event which prevent page is not direct event it is followed in two steps which is missing and could be assumption.

Demudifying--> fungus does not develop ---> food not left to survive paper lace

Now, even if new fungus not develop but leftover fungus spore could be food of paper lace which could further damage the paper.
Re: Paper lice feed on microscopic spores of a certain fungus that grows p   [#permalink] 30 Jun 2019, 03:49
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