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

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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 28 Aug 2016, 04:49
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Re: Each species of moth has an optimal body temperature for effective fli [#permalink]

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New post 08 Aug 2017, 11:20
Merged topics. Please, search before posting questions!
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Re: Each species of moth has an optimal body temperature for effective fli [#permalink]

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New post 22 Oct 2017, 09:22
neeshpal 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 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


IMO, straight B.

Only B that contains and have the relationship with the "temperature".
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Re: Each species of moth has an optimal body temperature for effective fli   [#permalink] 22 Oct 2017, 09:22

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