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Updated on: 23 Jan 2021, 04:29
Originally posted by abansal1805 on 08 Nov 2017, 08:37.
Last edited by Sajjad1994 on 23 Jan 2021, 04:29, edited 3 times in total.
Last edited by Sajjad1994 on 23 Jan 2021, 04:29, edited 3 times in total.
Added Qs#4-7
Kudos
Bookmarks
Question 1
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
59% (03:14) correct
41%
(03:14) wrong
based on 908
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
63% (00:47) correct 37%
(00:53) wrong
based on 906
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
42% (01:21) correct 58%
(01:25) wrong
based on 890
sessions
History
Date
Time
Result
Not Attempted Yet
Question 4
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
90% (00:54) correct 10%
(01:10) wrong
based on 282
sessions
History
Date
Time
Result
Not Attempted Yet
Question 5
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
80% (00:52) correct 20%
(01:06) wrong
based on 294
sessions
History
Date
Time
Result
Not Attempted Yet
Question 6
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
67% (01:22) correct 33%
(01:39) wrong
based on 290
sessions
History
Date
Time
Result
Not Attempted Yet
Question 7
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
49% (01:13) correct 51%
(01:24) wrong
based on 290
sessions
History
Date
Time
Result
Not Attempted Yet
Researchers traditionally have attempted to track animals by tagging them. Seeking an alternative tracking method, Brian W. Bowen, an evolutionary geneticist, turned to four green turtle breeding sites in the Atlantic and the Caribbean. He and his co-workers reported that turtles from the four breeding sites tended to have slightly different genetic markings.
Bowen analyzed mitochondrial DNA from eggs and hatchlings. The existence of variations in DNA among geographically distinct groups has helped scientists evaluate the different theories of the mating habits of the green turtle. Their findings, Bowen asserts, lend credence to the “natal homing” theory. This theory holds that while reptiles born in different regions may share common feeding grounds away from home, the animals part company at breeding time, each swimming hundreds or thousands of miles to breed and nest at its own birthplace.
Bowen and his co-workers, however, offer several caveats to the interpretation of their findings. They note that turtles from two of the nesting sites—Florida’s Hutchinson Island and Costa Rica’s Tortuguero sanctuary—had indistinguishable mitochondrial DNA sequences. This finding indicates that either some social mixing occurred between these two groups or that the DNA test was not sensitive enough to detect extremely subtle differences in DNA. In addition, they report that one of eight study turtles from Aves Island, off Venezuela, showed the same genetic pattern as the Tortuguero and Hutchinson turtles in their sample. Nonetheless, Bowen’s study appears to have bolstered the idea that most populations of green turtles are genetically distinct, and that the turtles return to their birthplaces at nesting time.
Bowen analyzed mitochondrial DNA from eggs and hatchlings. The existence of variations in DNA among geographically distinct groups has helped scientists evaluate the different theories of the mating habits of the green turtle. Their findings, Bowen asserts, lend credence to the “natal homing” theory. This theory holds that while reptiles born in different regions may share common feeding grounds away from home, the animals part company at breeding time, each swimming hundreds or thousands of miles to breed and nest at its own birthplace.
Bowen and his co-workers, however, offer several caveats to the interpretation of their findings. They note that turtles from two of the nesting sites—Florida’s Hutchinson Island and Costa Rica’s Tortuguero sanctuary—had indistinguishable mitochondrial DNA sequences. This finding indicates that either some social mixing occurred between these two groups or that the DNA test was not sensitive enough to detect extremely subtle differences in DNA. In addition, they report that one of eight study turtles from Aves Island, off Venezuela, showed the same genetic pattern as the Tortuguero and Hutchinson turtles in their sample. Nonetheless, Bowen’s study appears to have bolstered the idea that most populations of green turtles are genetically distinct, and that the turtles return to their birthplaces at nesting time.
Q1. It can be inferred from the passage that the turtles from the Aves Island study
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
B. have shown that using DNA to track turtles is a flawed technique
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
D. are part of an endangered species
E. had DNA that differs from those turtles that are from Venezuela
Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
B. present a new idea along with some data
C. establish the infallibility of a new concept
D. confirm the validity of a novel hypothesis
E. track the development of a particular species
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
B. Is there extensive interbreeding among green turtles from different areas?
C. To what extent can DNA testing be used to detect genetic differences?
D. Does tagging wild animals with metal disks or wires alter their mating habits?
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
4. According to the passage, the discovery of the “existence of variations in DNA among geographically distinct" (Highlighted) turtle groups has
A. helped Bowen to become one of the field's leading experts
B. discredited previous notions of turtle breeding
C. confirmed the existence of a single original species of turtle
D. given some validity to the "natal homing" theory
E. explained similarities between turtles with subtle DNA differences
5. According to the passage, Bowen developed his natural markings tracking method in order to
A. find a way to track turtles without interfering in their natural routines
B. discover an alternative to tagging animals
C. overcome difficulties in tagging turtles with disks or wires
D. show that the possibilities of DNA technology are virtually limitless
E. lend credence to the "natal homing" theory
6. Which of the following would most strengthen the “natal homing" theory concerning the genetic differences among green turtles?
A. New studies indicate that green turtles can interbreed and their offspring still retain genetic distinctions.
B. The population of green turtles at Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary has declined in recent years.
C. Bowen was recently asked to do further research on genetic differences among green turtles.
D. Recent tests found that there were subtle differences between the mitochondrial UNA sequences found in turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary.
E. Research done on DNA testing has shown that DNA is not always a reliable measure of genetic differences.
7. According to the passage, which of the following supports the contention that green turtles rarely interbreed?
A. Some turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary had indistinguishable mitochondrial DNA sequences.
B. One of eight turtles studied from Aves Island, Venezuela shared a genetic pattern characteristic of turtles from a different breeding ground.
C. When analyzing the DNA of turtles, scientists found differences in the genetic makeup of turtles from various areas.
D. Bowen's team found a discrete mitochondrial pattern in each turtle they studied.
E. Turtles from each nesting ground share common feeding grounds that may be thousands of miles apart.
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
B. have shown that using DNA to track turtles is a flawed technique
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
D. are part of an endangered species
E. had DNA that differs from those turtles that are from Venezuela
Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
B. present a new idea along with some data
C. establish the infallibility of a new concept
D. confirm the validity of a novel hypothesis
E. track the development of a particular species
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
B. Is there extensive interbreeding among green turtles from different areas?
C. To what extent can DNA testing be used to detect genetic differences?
D. Does tagging wild animals with metal disks or wires alter their mating habits?
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
4. According to the passage, the discovery of the “existence of variations in DNA among geographically distinct" (Highlighted) turtle groups has
A. helped Bowen to become one of the field's leading experts
B. discredited previous notions of turtle breeding
C. confirmed the existence of a single original species of turtle
D. given some validity to the "natal homing" theory
E. explained similarities between turtles with subtle DNA differences
5. According to the passage, Bowen developed his natural markings tracking method in order to
A. find a way to track turtles without interfering in their natural routines
B. discover an alternative to tagging animals
C. overcome difficulties in tagging turtles with disks or wires
D. show that the possibilities of DNA technology are virtually limitless
E. lend credence to the "natal homing" theory
6. Which of the following would most strengthen the “natal homing" theory concerning the genetic differences among green turtles?
A. New studies indicate that green turtles can interbreed and their offspring still retain genetic distinctions.
B. The population of green turtles at Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary has declined in recent years.
C. Bowen was recently asked to do further research on genetic differences among green turtles.
D. Recent tests found that there were subtle differences between the mitochondrial UNA sequences found in turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary.
E. Research done on DNA testing has shown that DNA is not always a reliable measure of genetic differences.
7. According to the passage, which of the following supports the contention that green turtles rarely interbreed?
A. Some turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary had indistinguishable mitochondrial DNA sequences.
B. One of eight turtles studied from Aves Island, Venezuela shared a genetic pattern characteristic of turtles from a different breeding ground.
C. When analyzing the DNA of turtles, scientists found differences in the genetic makeup of turtles from various areas.
D. Bowen's team found a discrete mitochondrial pattern in each turtle they studied.
E. Turtles from each nesting ground share common feeding grounds that may be thousands of miles apart.
Sreyoshi007
Joined: 01 Feb 2018
Last visit: 18 Mar 2019
Posts: 82
Given Kudos: 769
Location: India
Schools: ISB '20 (WA) NUS '21 (I) NTU '20 (D)
GMAT 1: 700 Q47 V38
WE:Consulting (Consulting)
30 Aug 2018, 04:17
Kudos
Bookmarks
Q1. It can be inferred from the passage that the turtles from the Aves Island study
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
B. have shown that using DNA to track turtles is a flawed technique
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
D. are part of an endangered species
E. had DNA that differs from those turtles that are from Venezuela
Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
Disproving any theory is not mentioned in the passage. Eliminate A.
B. present a new idea along with some data
Yes, we are presented with a new idea ( an alternate tracking method) and we are we are given several examples.
This is the correct answer.
C. establish the infallibility of a new concept
Passage does not mention infallibility of the new concept. Eliminate C.
D. confirm the validity of a novel hypothesis
No novel hypothesis has been validated. Eliminate D.
E. track the development of a particular species.
Passage is concerned about seeking an alternative tracking method, not tracking the development of a particular species. Eliminate E.
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
B. Is there extensive interbreeding among green turtles from different areas?
C. To what extent can DNA testing be used to detect genetic differences?
D. Does tagging wild animals with metal disks or wires alter their mating habits?
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
This was a tough one.
We can eliminate option E as the mechanism by which green turtles find their way back is not covered and hence can't be answered.
Similarly we can eliminate D easily as there is no mention of metal disks or wires in the passage.
We can also eliminate C as we can't answer to what extent can DNA testing be used.
Now I was confused between option A and B.
Since the passage did not mention if the social mixing occurred or not, I ended up eliminating A.
Please press Kudos if this helped.
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
B. have shown that using DNA to track turtles is a flawed technique
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
D. are part of an endangered species
E. had DNA that differs from those turtles that are from Venezuela
Quote:
In addition, they report that one of eight study turtles from Aves Island, off Venezuela, showed the same genetic pattern as the Tortuguero and Hutchinson turtles in their sample.
As per the above mentioned lines in the passage, option A seems fitting.Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
Disproving any theory is not mentioned in the passage. Eliminate A.
B. present a new idea along with some data
Yes, we are presented with a new idea ( an alternate tracking method) and we are we are given several examples.
This is the correct answer.
C. establish the infallibility of a new concept
Passage does not mention infallibility of the new concept. Eliminate C.
D. confirm the validity of a novel hypothesis
No novel hypothesis has been validated. Eliminate D.
E. track the development of a particular species.
Passage is concerned about seeking an alternative tracking method, not tracking the development of a particular species. Eliminate E.
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
B. Is there extensive interbreeding among green turtles from different areas?
C. To what extent can DNA testing be used to detect genetic differences?
D. Does tagging wild animals with metal disks or wires alter their mating habits?
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
This was a tough one.
We can eliminate option E as the mechanism by which green turtles find their way back is not covered and hence can't be answered.
Similarly we can eliminate D easily as there is no mention of metal disks or wires in the passage.
We can also eliminate C as we can't answer to what extent can DNA testing be used.
Now I was confused between option A and B.
Quote:
This finding indicates that either some social mixing occurred between these two groups or that the DNA test was not sensitive enough to detect extremely subtle differences in DNA.
Since the passage did not mention if the social mixing occurred or not, I ended up eliminating A.
Please press Kudos if this helped.
Prateek176
Joined: 12 Mar 2017
Last visit: 10 Jun 2021
Posts: 180
Given Kudos: 87
Location: India
Concentration: Strategy, General Management
Schools: ISB '21 (D) IIMC MBAEx "21 (WL)
GMAT 1: 700 Q49 V37
GPA: 4
30 Aug 2018, 11:48
Kudos
Bookmarks
Q1. It can be inferred from the passage that the turtles from the Aves Island study
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
Correct as mentioned directly in the passage.
B. have shown that using DNA to track turtles is a flawed technique
The passage doesn't say that. Agreed that there are multiple interpretations of the technique by Bowen and his co-workers as mentioned in the first line of last para. But the last line of the same para supports the study. Eliminate B
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
Nope. only One out of the eight does.
D. are part of an endangered species
Nowhere mentioned. Eliminate
E. had DNA that differs from those turtles that are from Venezuela
Nowhere mentioned. Eliminate
Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
Nope. It doesn't disprove the existing thoery. As first line of the passage suggests, they are only looking for alternate theories.
B. present a new idea along with some data
Bingo!! That's what's discussed throughout the passage
C. establish the infallibility of a new concept
Wrong. The new concept also does have some loopholes which are discussed in the last para. There are multiple interpretations of the technique by Bowen and his co-workers as mentioned in the first line of last para
D. confirm the validity of a novel hypothesis
They don't confirm it's validity. They only mention in the last line that the study bolsters an idea.
E. track the development of a particular species
The primary purpose is to look for some new idea to track animals. For that purpose they track a particular species. Classic trap choice
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
It doesn't answer that, Passage itself mentions that there are multiple interpretations
B. Is there extensive interbreeding among green turtles from different areas?
Correct. As the passage mentions "Bowen’s study appears to have bolstered the idea that most populations of green turtles are genetically distinct, and that the turtles return to their birthplaces at nesting time.". There may be interbreeding among some species as mentioned in the last para. But that is only speculated. Their findings, Bowen asserts, lend credence to the “natal homing” theory. So there is no way extensive interbreeding will happen. Because if it does then why would turtles swim thousands of miles to their homelands.
C. To what extent can DNA testing be used to detect genetic differences?
Doesn't answer
D. Does tagging wild animals with metal disks or wires alter their mating habits?
Nowhere mentioned
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
Nowhere mentioned
Kudos if you like the post
A. had, with the exception of one, genetic patterns distinct from those in the Tortuguero study
Correct as mentioned directly in the passage.
B. have shown that using DNA to track turtles is a flawed technique
The passage doesn't say that. Agreed that there are multiple interpretations of the technique by Bowen and his co-workers as mentioned in the first line of last para. But the last line of the same para supports the study. Eliminate B
C. all exhibited genetic patterns similar to those of the Hutchinson and Tortuguero study turtles
Nope. only One out of the eight does.
D. are part of an endangered species
Nowhere mentioned. Eliminate
E. had DNA that differs from those turtles that are from Venezuela
Nowhere mentioned. Eliminate
Q2. The primary purpose of this passage is to
A. disprove a previously existing theory
Nope. It doesn't disprove the existing thoery. As first line of the passage suggests, they are only looking for alternate theories.
B. present a new idea along with some data
Bingo!! That's what's discussed throughout the passage
C. establish the infallibility of a new concept
Wrong. The new concept also does have some loopholes which are discussed in the last para. There are multiple interpretations of the technique by Bowen and his co-workers as mentioned in the first line of last para
D. confirm the validity of a novel hypothesis
They don't confirm it's validity. They only mention in the last line that the study bolsters an idea.
E. track the development of a particular species
The primary purpose is to look for some new idea to track animals. For that purpose they track a particular species. Classic trap choice
Q3. The information provided in the passage about Bowen's research can be used to answer which of the following questions?
A. Does social mixing occur between turtles from Florida's Hutchinson Island and Costa Rica's Tortuguero sanctuary?
It doesn't answer that, Passage itself mentions that there are multiple interpretations
B. Is there extensive interbreeding among green turtles from different areas?
Correct. As the passage mentions "Bowen’s study appears to have bolstered the idea that most populations of green turtles are genetically distinct, and that the turtles return to their birthplaces at nesting time.". There may be interbreeding among some species as mentioned in the last para. But that is only speculated. Their findings, Bowen asserts, lend credence to the “natal homing” theory. So there is no way extensive interbreeding will happen. Because if it does then why would turtles swim thousands of miles to their homelands.
C. To what extent can DNA testing be used to detect genetic differences?
Doesn't answer
D. Does tagging wild animals with metal disks or wires alter their mating habits?
Nowhere mentioned
E. By what mechanism do green turtles find their way back to their birthplace when they are ready to breed?
Nowhere mentioned
Kudos if you like the post
