Male bowerbirds construct elaborately decorated nests, or : GMAT Critical Reasoning (CR)
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# Male bowerbirds construct elaborately decorated nests, or

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Male bowerbirds construct elaborately decorated nests, or [#permalink]

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15 Apr 2011, 20:00
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Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers that exhibit different building and decorative styles, researchers have concluded that the bowerbirdsâ€™ building styles are a culturally acquired, rather than a genetically transmitted, trait.

Which of the following, if true, would most strengthen the conclusion drawn by the researchers?

A. There are more common characteristics than there are differences among the bowerbuilding styles of the local bowerbird population that has been studied most extensively.
B. Young male bowerbirds are inept at bowerbuilding and apparently spend years watching their elders before becoming accomplished in the local bower style.
C. The bowers of one species of bowerbird lack the towers and ornamentation characteristic of the bowers of most other species of bowerbird.
D. Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.
E. It is well known that the song dialects of some songbirds are learned rather than transmitted genetically.

Why not...
[Reveal] Spoiler:
[Reveal] Spoiler: OA

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15 Apr 2011, 22:46
D. Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.

D does not disprove the fact that the building style could still be genetically transmitted among species.
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15 Apr 2011, 23:08
It's truly (B)
I saw few other questions with the same line of reasoning.
But why we can't use (C)? I feel it's incorrect, but can't explain with words)
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16 Apr 2011, 00:11
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Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers that exhibit different building and decorative styles, researchers have concluded that the bowerbirdsâ€™ building styles are a culturally acquired, rather than a genetically transmitted, trait.

Which of the following, if true, would most strengthen the conclusion drawn by the researchers?

The conclusion is building styles are culturally acquired and are not genetically transmitted.

C. The bowers of one species of bowerbird lack the towers and ornamentation characteristic of the bowers of most other species of bowerbird.

C proves that the building styles are different among different species, but does it prove that the building styles are not genetically transmitted among same species?. I think you may be getting confused by different species and same species. It is enough to consider the same species, since that is what the author is primarily talking about.
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16 Apr 2011, 00:56
Yes, i'm getting it.
Thanks!
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27 Apr 2011, 06:31
'Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.'

they may still have very similar style of making nests , as they are genetically same species. so D does not in anyway strengthen the argument.
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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16 Jun 2013, 03:38
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B.

Young Male bowerbirds are 'inept' at bowerbuilding.....and learn from their elders.

Thus, this skill is not genetic.
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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17 Jun 2013, 16:53
metallicafan wrote:
Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers that exhibit different building and decorative styles, researchers have concluded that the bowerbirdsâ€™ building styles are a culturally acquired, rather than a genetically transmitted, trait.

Which of the following, if true, would most strengthen the conclusion drawn by the researchers?

A. There are more common characteristics than there are differences among the bowerbuilding styles of the local bowerbird population that has been studied most extensively.
B. Young male bowerbirds are inept at bowerbuilding and apparently spend years watching their elders before becoming accomplished in the local bower style.
C. The bowers of one species of bowerbird lack the towers and ornamentation characteristic of the bowers of most other species of bowerbird.
D. Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.
E. It is well known that the song dialects of some songbirds are learned rather than transmitted genetically.

Why not...
[Reveal] Spoiler:

This is one of those questions that uses definition of culture. I mean how does we "human beings" learn about our culture. It is something we learn from our parents. Stupidly, i marked A but on thinking a bit, i realized B is the more appropriate answer.
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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27 Apr 2014, 09:36
Can someone please explain why A is incorrect?

If there are similarities within a region, doesn't that imply that culture has influenced the design style?
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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02 Dec 2014, 07:04
russ9 wrote:
Can someone please explain why A is incorrect?

If there are similarities within a region, doesn't that imply that culture has influenced the design style?

Its not about the similarities within a region, you have to pick the answer , that clearly shows that the buildingstyle is culturally aquired.

If buildings in a region look like each other, it still doesn't say anything about the reason WHY they look like each other.
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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06 Jun 2015, 08:44
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Can someone please explain why D is wrong? If they seldom have contact with each other, then they are culturally different. Does this not lend support to the fact that the building styles are culturally acquired?
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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13 Jun 2015, 10:00
sudhanshu631 wrote:
Can someone please explain why D is wrong? If they seldom have contact with each other, then they are culturally different. Does this not lend support to the fact that the building styles are culturally acquired?

Hi!
We are told about two possible ways that building styles could be acquired by the said species:
1. Genetically transmitted.
2. Culturally acquired (the one that we should strengthen)

Let's know see what happens if we examine both under "D".

1. If that trait is genetically transmitted then it doesn't matter if they contact seldom or not. This argument doesn't prove or disprove this theory.

2. It they are culturally acquired then absence of contact will induce differences in building styles!
But that is not the question! The task is to support "culturally acquired" against "genetically transmitted". D does not do anything, both ways of acquiring the traits can be true under D.

Hope that helps!
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Re: Male bowerbirds construct elaborately decorated nests, or [#permalink]

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23 Nov 2015, 09:06
ulm wrote:
It's truly (B)
I saw few other questions with the same line of reasoning.
But why we can't use (C)? I feel it's incorrect, but can't explain with words)

option talks about different species but not of same species.
Re: Male bowerbirds construct elaborately decorated nests, or   [#permalink] 23 Nov 2015, 09:06
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