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Each species of moth has an optimal body temperature for effective fli

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Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post Updated on: 09 Dec 2018, 02:58
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Which of the following most logically completes the passage?

Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why _______.


(A) large moths are generally able to maneuver better in flight than smaller moths

(B) large moths are proportionally much more common in warm climates than in cool climates

(C) small moths are more likely than large moths to be effectively camouflaged while on vegetation

(D) large moths typically have wings that are larger in proportion to their body size than smaller moths do

(E) most predators of moths prey not only on several different species of moth but also on various species of other insects

Originally posted by neeshpal on 06 May 2009, 13:16.
Last edited by Bunuel on 09 Dec 2018, 02:58, edited 2 times in total.
Edited the question.
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 06 May 2009, 15:08
I would go with B.

here is my explanation ,Though I am not good in explaining so pardon me in case i am not able to provide explanation clearly

Argument starts with describing relationship between optimal body temp and flying and role of air temp. Then the focus shifts to Large moths and the but also ... indicates that the author is giving a different perspective and B fits.

A. large moths are generally able to maneuver better in flight than smaller moths -large moths can fly faster however this does not go with the but also statement

B. large moths are proportionally much more common in warm climates than in cool climates

C. small moths are more likely than large moths to be effectively camouflaged while on vegetation - this doesn't make sense to me as there is no discussion on camouflaged
D. large moths typically have wings that are larger in proportion to their body size than smaller moths do - so what ?
E. most predators of moths prey not only on several different species of moth but also on various species of other insects - this is not at all related
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 06 May 2009, 19:16
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Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

A. large moths are generally able to maneuver better in flight than smaller moths --> no info
B. large moths are proportionally much more common in warm climates than in cool climates --> best. Because of less vulnerable in warm climates than in cool climates, they are less likely to be eaten and thus proportionally more common in warm climates than in cool cliamtes
C. small moths are more likely than large moths to be effectively camouflaged while on vegetation --> no info about camouflage
D. large moths typically have wings that are larger in proportion to their body size than smaller moths do --> no info about size
E. most predators of moths prey not only on several different species of moth but also on various species of other insects --> irrelevant
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 17 Dec 2009, 05:57
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

A. large moths are generally able to maneuver better in flight than smaller moths-------INCORRECT stimulus doesnt mention any relation between maneuvering and moths
B. large moths are proportionally much more common in warm climates than in cool climatesCORRECT. If larger moths have high optimal body temperatures they would be found more in warmer climates than in cooler climates as in cooler climates the differential temperature between their high optimal body temperature will be larger and hence they would have to remain inactive
C. small moths are more likely than large moths to be effectively camouflaged while on vegetation INCORRECT. This is a trap. Both would need camouflaging/or any other mechanism to escape predators while on vegetation irrespective of their flying abilities
D. large moths typically have wings that are larger in proportion to their body size than smaller moths doINCORRECT. The relationship with larger wings and body temperature seems out of scope as it doesnt make any sense here
E. most predators of moths prey not only on several different species of moth but also on various species of other insectINCORRECT. Out of scope


Hope this resolves the confusion between B and C
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 02 Jan 2010, 12:21
neeshpal wrote:
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

A. large moths are generally able to maneuver better in flight than smaller moths
B. large moths are proportionally much more common in warm climates than in cool climates
C. small moths are more likely than large moths to be effectively camouflaged while on vegetation
D. large moths typically have wings that are larger in proportion to their body size than smaller moths do
E. most predators of moths prey not only on several different species of moth but also on various species of other insects

please explain...


i would go with B after POE..
A.Too extreme a sentence for the information provided int he text about the flight of the moths.
C.Camouflage not discussed.
D.Wing Size not discussed.
E.Other insects do not discussed.
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 29 Aug 2011, 23:59
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kaliaabhishek wrote:
I think C..mainly coz 'but' is used...
plz provide the OA


"camouflaging" is not at all mentioned in the passage. I don't know where is this question from. But, "B" seems more plausible. Smaller moth-lower body temperature-relatively less warm climate is ideal.
Larger moth-higher body temperature-relatively higher warm climate is ideal, or they won't function as effectively.

You are right in noticing "but". "but" should show a contrast that rules out "A" as an answer. Also, "B" shows a reason why the higher body temperature is suited better for warmer climate, and we definitely need a reason "which explains why".

Ans: "B"
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If anyone knows the source and OA for this question, please PM or reply to the post. thanks
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 18 Jun 2015, 13:24
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naeln wrote:
Which of the following most logically completes the passage?
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why
-----------------
A. Large moths are generally able to maneuver better in flight than smaller moths.
B. Large moths are proportionally much more common in warm climates than in cool climates
C. Small moths are more likely than large moths to be effectively camouflaged while on vegetation
D. Large moths typically have wings that are larger in proportion to their body size than smaller moths do
E. Most predators of moths prey not only on several different species of moth but also on various species of other insects

Can any one explain how to go about this question?

Hi naeln!
You have to find an answer that is compatible with an information given. Look at the answers.
A. Do we know this? No this may be true or not true
B. This is correct answer. If large moths have higher body temperature then it is likely that in warm climate live more large moths than live in cold climate. Just think in terms of their ability to escape from predators. In warm climate moths are better able to escape since here temperature is usually higher than in cold climate. Hence moths are better able to avoid flying predators
C. We don't know about camouflage abilities.
D.Body temperature doesn't explain why large moths have wings that are larger in proportion
E.We don't know how body temperature relates to number of species that moths prey on. Even if large moths can fly faster how is it related with number of insects?
Hope it is clear
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 20 Jun 2015, 09:03
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

premise 1 : optimal body temperature for effective flight
premise 2 : larger moth more optimal temperature for flight.
The below option which explain the above premise:


A. large moths are generally able to maneuver better in flight than smaller moths
We are not concerned about maneuvering aspect of the flight. we are just bothered about the relation between flight of larger moth and optimal temperature

B. large moths are proportionally much more common in warm climates than in cool climates
This option talks about why more larger moth are present in warm climates compared to cool climates as larger moth has higher optimal temperatures -> Correct

C. small moths are more likely than large moths to be effectively camouflaged while on vegetation
We are not concerned about the "camouflage" aspect of the moth.

D. large moths typically have wings that are larger in proportion to their body size than smaller moths do
We are not concerned about the larger wings of large moths.

E. most predators of moths prey not only on several different species of moth but also on various species of other insects
We are not concerned about the prey aspect of the moths
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 20 Jun 2015, 10:28
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naeln wrote:
Which of the following most logically completes the passage?
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why
-----------------
A. Large moths are generally able to maneuver better in flight than smaller moths
B. Large moths are proportionally much more common in warm climates than in cool climates
C. Small moths are more likely than large moths to be effectively camouflaged while on vegetation
D. Large moths typically have wings that are larger in proportion to their body size than smaller moths do
E. Most predators of moths prey not only on several different species of moth but also on various species of other insects

Can any one explain how to go about this question?


Premise - Moths have optimal body temperature for effective flight and when the temperature drops the moths have to remain inactive - highly vulnerable to predators
Large moths can fly faster than small ones but they have higher optimal body temperatures.

If Large moths have higher optimal temperature then they would most commonly be found in areas which have relatively higher temperature.
If they live in areas which have lower temperature then they would be vulnerable to predators.
Only Option B supports this.

A. Large moths are generally able to maneuver better in flight than smaller moths
- There is no mention of maneuvering in the argument.
B. Large moths are proportionally much more common in warm climates than in cool climates
- Right choice for the reason stated above.
C. Small moths are more likely than large moths to be effectively camouflaged while on vegetation
- The argument does not mention anything about camouflaging.
D. Large moths typically have wings that are larger in proportion to their body size than smaller moths do
- The argument does not mention anything about wing size.
E. Most predators of moths prey not only on several different species of moth but also on various species of other insects
- There is no mention of other species

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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 21 Jun 2015, 08:26
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naeln wrote:
Which of the following most logically completes the passage?
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why
-----------------
A. Large moths are generally able to maneuver better in flight than smaller moths
B. Large moths are proportionally much more common in warm climates than in cool climates
C. Small moths are more likely than large moths to be effectively camouflaged while on vegetation
D. Large moths typically have wings that are larger in proportion to their body size than smaller moths do
E. Most predators of moths prey not only on several different species of moth but also on various species of other insects

Can any one explain how to go about this question?


Moths - Inactive when temp falls below optimal Temp.
If inactive, then Moths are venerable and can be killed.

Optimal Temp of Big Moth is higher than Optimal temp of Small moth.
Big Moth Speed > Small moth's speed.

Pre thinking :
1. Big moth are More in numbers in warm whether since attackers will kill small one first.


A. Large moths are generally able to maneuver better in flight than smaller moths
Nice fact, but it is not supported by argument. Out of scope.

B. Large moths are proportionally much more common in warm climates than in cool climates
Correct matched Pre thinking. Supported by argument.

C. Small moths are more likely than large moths to be effectively camouflaged while on vegetation
Out of scope. This comparison has not been discussed in argument.

D. Large moths typically have wings that are larger in proportion to their body size than smaller moths do
Out of scope. Wings size not discussed

E. Most predators of moths prey not only on several different species of moth but also on various species of other insects
Out of scope. Predators taste is not discussed.

Answer : Option B
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 11 Aug 2015, 22:49
kinjiGC wrote:
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

B. large moths are proportionally much more common in warm climates than in cool climates
This option talks about why more larger moth are present in warm climates compared to cool climates as larger moth has higher optimal temperatures -> Correct





kinjiGC thanks for the explanation

I feel there is no Logically connectivity when B is plugged and the sentence is read as a whole.

In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why large moths are proportionally much more common in warm climates than in cool climates.

Generally BUT is used to spot out contradictions : Ex: I walk very fast , but I cannot Run.
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Re: Each species of moth has an optimal body temperature for effective fli  [#permalink]

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New post 09 Dec 2018, 02:36
Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators. In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why _______.

(A) large moths are generally able to maneuver better in flight than smaller moths

(B) large moths are proportionally much more common in warm climates than in cool climates - CORRECT. better chance of evading predators is only possible when larger moths can fly more effectively than the smaller ones. But larger moths have high optimal temperature so have to be more abundant in warmer climates for flying faster.

(C) small moths are more likely than large moths to be effectively camouflaged while on vegetation

(D) large moths typically have wings that are larger in proportion to their body size than smaller moths do

(E) most predators of moths prey not only on several different species of moth but also on various species of other insects
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Re: Each species of moth has an optimal body temperature for effective fli &nbs [#permalink] 09 Dec 2018, 02:36
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