Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized for You
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
Updated on: 07 Jul 2013, 01:26
2
17
00:00
A
B
C
D
E
Difficulty:
35% (medium)
Question Stats:
72% (01:52) correct 28% (02:10) wrong based on 1417 sessions
HideShow timer Statistics
On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
A. In urban areas, geckos are valued because they eat so many insects.
B. Geckos defend territories against other members of the same species.
C. House geckos that arrive on islands are carried there in boats and planes.
D. places where there are lighted buildings, insects tend to gather around the light.
E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
07 Jul 2013, 01:25
15
5
fozzzy wrote:
Can someone provide a detailed analysis on this question. Thanks!
ANALYZE THE STIMULUS:
Fact: A newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, Fact: But populations of the two species are more stable in rural areas far from human settlement. Fact: The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
KEY POINT is: competing for food (insect) ==> difference in populations.
ANALYZE EACH ANSWER:
A. In urban areas, geckos are valued because they eat so many insects. Wrong. Does not explain the difference between populations of the two geckos in urban and rural areas.
B. Geckos defend territories against other members of the same species. Wrong. Same as A.
C. House geckos that arrive on islands are carried there in boats and planes. Wrong. Same as A
D. places where there are lighted buildings, insects tend to gather around the light. Correct. Because the two geckos have same eating habit, they eat insect. In rural areas, because of few lights, the food – “insect populations” is spread, the two geckos seem to have same opportunity to access the food source (Remember fact#3: house gecko does NOT attack mourning gecko). ==> The two geckos' populations seem to be the same in rural areas. However, in urban areas, insects gather around the light, the the “stronger” gecko will defeat the “weaker” one to get food – insect. That makes the population of house gecko in urban areas is larger the that of mourning gecko.
E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually. Wrong. Does not help. The main point is “competing for food ==> difference in population”
Hope it helps
_________________
Please +1 KUDO if my post helps. Thank you.
"Designing cars consumes you; it has a hold on your spirit which is incredibly powerful. It's not something you can do part time, you have do it with all your heart and soul or you're going to get it wrong."
House gecko prevents mourning gecko from feeding in areas whre insects congregate: Thus if insects tend to congregate near the ligth it is logical to assume that in urban areas mourning gecko has a hard time getting something to eat...
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
07 Jul 2013, 01:41
2
FACT 1:The house gecko is displacing the previously established mourning gecko in urban areas Populations of the two species are more stable in rural areas far from human settlement.
FACT 2:The house gecko prevents the mourning gecko from feeding on insects.
The correct answer will link the two fact, will be something that show a difference between the two areas.
How they reproduce, how they arrived on the island, why they are valued are all out of scope.
A. In urban areas, geckos are valued because they eat so many insects. C. House geckos that arrive on islands are carried there in boats and planes. E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.
The real contenders IMO are B and D. B. Geckos defend territories against other members of the same species. This is not actually a difference between the two areas (it is not specified where this happens) and moreover it does not link fact 1 and fact 2. D. places where there are lighted buildings, insects tend to gather around the light. where there are lighted buildings (URBAN AREAS) insects tend to gather around the light + FACT 2:The house gecko prevents the mourning gecko from feeding on insects. => FACT 1.
_________________
It is beyond a doubt that all our knowledge that begins with experience.
On Pacific islands, a newly arrived gecko species
[#permalink]
Show Tags
25 Jan 2015, 20:54
2
1
On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them. Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
A. In urban areas, geckos are valued because they eat so many insects. B. Geckos defend territories against other members of the same species. C. House geckos that arrive on islands are carried there in boats and planes. D. In places where there are lighted buildings, insects tend to gather around the light. E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.
D. there's a logic gap in the passage: we're told that the house gecko is making gains in areas where humans settle, and we're then informed that the house gecko displaces the mourning gecko from feeding where insects congregate. therefore, we need an answer choice that connects these two ideas.
choice d is the only answer choice that reasonably links human settlement to congregations of insects, so it must be the correct choice.
Re: On Pacific islands, a newly arrived gecko species
[#permalink]
Show Tags
25 Jan 2015, 23:04
1
Answer: Explanation to the difference between gecko population in urban and rural areas. Need to explain why there is a difference between gecko population in urban and rural areas
Conclusion: house gecko is displacing the previously established morning gecko in urban areas. Premise: Areas where insects congregate it prevents the mourning gecko from feeding on them. So if it is proved that this congregation takes place only in urban areas than it gives an explanation or reason for the difference between gecko population in urban areas only a. wrong. no difference between house and morning gecko. b. wrong c. wrong d. correct: mentioned that two species are more stable in rural areas far from human settlement rural settlement is the area which is far from human settlement. hence if the congregation of insects take plan in lighted building(urban areas) than it gives an explanation for the given difference. At the lighted building(urban areas) house gecko prevents mourning gecko from feeding on them, which eventually leads to reduced population of mourning gecko. e. wrong
_________________
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
30 May 2015, 22:01
1
On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
The Congregation of the insects happens in Urban area and doesn't happen the rural areas.
We need to find the reason for that difference
A. In urban areas, geckos are valued because they eat so many insects -> This option doesn't talk about congregation
B. Geckos defend territories against other members of the same species -> Doesn't talk about difference in Urban and rural areas
C. House geckos that arrive on islands are carried there in boats and planes -> Out of scope
D. places where there are lighted buildings, insects tend to gather around the light. -> Provides a reason for the congregation -> Correct
E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually -> We are not talking about reproduction types here _________________
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
01 Jun 2015, 23:05
D Conclusion - the house gecko, is displacing the previously established mourning gecko in urban areas and not in rural areas. Premise - The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them. Thus one can pre-think that the conclusion is true because the urban area has more areas where inspects congregate D specifies one such area
_________________
Apoorv
I realize that i cannot change the world....But i can play a part
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
03 Jun 2015, 02:47
On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
A. In urban areas, geckos are valued because they eat so many insects. Gecko value and the reason for their value is irrelevant. B. Geckos defend territories against other members of the same species. This doesn't address urban areas or why one gecko species would have a greater population than the other. C. House geckos that arrive on islands are carried there in boats and planes. How the geckos arrive is not relevant. D. places where there are lighted buildings, insects tend to gather around the light. The house gecko prevents the mourning gecko from feeding in areas where insects congregate. Insects congregate around light. If the mourning gecko is prevented from feeding this would encourage its displacement. E. Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually. Differing methods of reproduction does not explain the difference in population.
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
24 Jun 2016, 04:09
Correct Choice is D) More insects in Urban area under the lights --> House Gecko prevent mourning Gecko feeding on the insects --> Reducing the population of the mourning Gecko
WE: Corporate Finance (Pharmaceuticals and Biotech)
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
25 Sep 2016, 10:56
manhasnoname wrote:
Where does the passage indicate that urban areas have lighted buildings and rural areas don't?
Should the test taker impart his/her outside knowledge to answer this question?
Yes this kind of small leap is acceptable in GMAT. That urban areas have more lighted buildings than rural areas is a basic knowledge that is alright to use.
On Pacific islands, a newly arrived gecko species
[#permalink]
Show Tags
04 Oct 2016, 11:42
2
All other options are irrelevant except D which points that it is in the urban areas that we have lighted buildings--> In places where there are lighted buildings, insects tend to gather around the light --> in areas where insects congregate it prevents the mourning gecko from feeding on them-->hence lower population of mourning gecko in urban areas.
WE: Corporate Finance (Pharmaceuticals and Biotech)
On Pacific islands, a newly arrived gecko species
[#permalink]
Show Tags
24 Nov 2016, 03:24
The OA is correct and explanation provided above appears sufficient. If there are any specific questions, please post them here and then click again on the "Request Expert Reply" button.
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
Show Tags
27 Apr 2017, 19:20
The question asks to identify an option that contributes most to an explanation of the difference between gecko populations in urban and rural areas.
In rural areas ---> no lighted buildings ---> no gathering (congregation) of insects around lights ---> House gecko not stopping Mourning gecko feeding on insects ---> probably no starving of Mourning gecko ---> stable population
In urban areas ---> lighted buildings ---> gathering (congregation) of insects around lights ---> House gecko stopping Mourning gecko feeding on insects ---> probably starving of Mourning gecko ---> reducing Mourning gecko population after introduction of House gecko.
Hence D.
_________________
Thanks & Regards, Anaira Mitch
gmatclubot
Re: On Pacific islands, a newly arrived gecko species, the house
[#permalink]
27 Apr 2017, 19:20
close
72% (01:52) correct 
