Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
GMAT Club Daily Prep
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1511:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease.
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!- Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options. - Dec 21
11:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment
20 Feb 2020, 06:56
Kudos
Bookmarks
D
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:
67% (01:56) correct
33%
(02:11)
wrong
based on 495
sessions
History
Date
Time
Result
Not Attempted Yet
Harris: Currently, hybrid animals are not protected by international endangered-species regulations. But new techniques in genetic research suggest that the red wolf, long thought to be an independent species, is a hybrid of the coyote and the gray wolf. Hence, since the red wolf clearly deserves protection, these regulations should be changed to admit the protection of hybrids.
Vogel: Yet hybrids do not need protection. Since a breeding population that arises through hybridization descends from independent species, if any such population were to die out, it could easily be revived by interbreeding members of the species from which the hybrid is descended.
Which one of the following is an assumption on which Vogel’s argument relies?
(A) The techniques currently being used to determine whether a population of animals is a hybrid of other species have proven to be reliable.
(B) The international regulations that protect endangered species and subspecies are being enforced successfully.
(C) The gray wolf has been successfully bred in captivity.
(D) All hybrids are the descendants of species that are currently extant.
(E) The coyote and the red wolf are not related genetically.
Vogel: Yet hybrids do not need protection. Since a breeding population that arises through hybridization descends from independent species, if any such population were to die out, it could easily be revived by interbreeding members of the species from which the hybrid is descended.
Which one of the following is an assumption on which Vogel’s argument relies?
(A) The techniques currently being used to determine whether a population of animals is a hybrid of other species have proven to be reliable.
(B) The international regulations that protect endangered species and subspecies are being enforced successfully.
(C) The gray wolf has been successfully bred in captivity.
(D) All hybrids are the descendants of species that are currently extant.
(E) The coyote and the red wolf are not related genetically.
24 Feb 2020, 23:20
Kudos
Bookmarks
Pre-thinking:
Harris thinks that hybrids, which are animals that descend from two independent species, should also be extended the protections offered by international endangered-species regulations. Vogel disagrees, reasoning that this is not necessary since a hybrid species, if happens to go extinct, can always be revived by interbreeding the two parent species.
Since we are asked to identify the Vogel's underlying assumption, we need something that
a) allows the interbreeding of parent species
AND/OR
b) removes any obstacles for such interbreeding
(A) The techniques currently being used to determine whether a population of animals is a hybrid of other species have proven to be reliable. This appears an interesting choice. If the techniques were unreliable, we may be unable to determine the exact parent species and hence may not be able to revive an extinct hybrid species. However, if the techniques were unreliable, we would be unable to determine which species are hybrid in the first place. Overall, this choice appears to go beyond the scope of Vogel's argument. Eliminate.
(B) The international regulations that protect endangered species and subspecies are being enforced successfully. Vogel's argument is concerned with interbreeding parent species and not the efficacy of regulations protecting extant species. Eliminate.
(C) The gray wolf has been successfully bred in captivity. This deals with intra-species breeding of the gray wolf and is hence not relevant to the inter-species breeding argument made by Vogel. Eliminate.
(D) All hybrids are the descendants of species that are currently extant. Correct. This assumes that all current hybrid species have parent species that are not extinct. This would allow for the inter-breeding of parent species in the event of the child species going extinct. If we negate this ie; if some hybrid species' parents species are extinct then in the event of extinction of the child species, it cannot be revived by inter-breeding the parent species since one (or both) are extinct. The argument breaks down.
(E) The coyote and the red wolf are not related genetically. This contradicts the premises given in the stimulus and hence cannot be an assumption. Furthermore, Vogel's argument is about hybrid species in general and one specific linkage or lack thereof does not impact it. Eliminate.
Hope this helps.
Harris thinks that hybrids, which are animals that descend from two independent species, should also be extended the protections offered by international endangered-species regulations. Vogel disagrees, reasoning that this is not necessary since a hybrid species, if happens to go extinct, can always be revived by interbreeding the two parent species.
Since we are asked to identify the Vogel's underlying assumption, we need something that
a) allows the interbreeding of parent species
AND/OR
b) removes any obstacles for such interbreeding
(A) The techniques currently being used to determine whether a population of animals is a hybrid of other species have proven to be reliable. This appears an interesting choice. If the techniques were unreliable, we may be unable to determine the exact parent species and hence may not be able to revive an extinct hybrid species. However, if the techniques were unreliable, we would be unable to determine which species are hybrid in the first place. Overall, this choice appears to go beyond the scope of Vogel's argument. Eliminate.
(B) The international regulations that protect endangered species and subspecies are being enforced successfully. Vogel's argument is concerned with interbreeding parent species and not the efficacy of regulations protecting extant species. Eliminate.
(C) The gray wolf has been successfully bred in captivity. This deals with intra-species breeding of the gray wolf and is hence not relevant to the inter-species breeding argument made by Vogel. Eliminate.
(D) All hybrids are the descendants of species that are currently extant. Correct. This assumes that all current hybrid species have parent species that are not extinct. This would allow for the inter-breeding of parent species in the event of the child species going extinct. If we negate this ie; if some hybrid species' parents species are extinct then in the event of extinction of the child species, it cannot be revived by inter-breeding the parent species since one (or both) are extinct. The argument breaks down.
(E) The coyote and the red wolf are not related genetically. This contradicts the premises given in the stimulus and hence cannot be an assumption. Furthermore, Vogel's argument is about hybrid species in general and one specific linkage or lack thereof does not impact it. Eliminate.
Hope this helps.
medag
Joined: 28 Dec 2019
Last visit: 30 Nov 2022
Posts: 21
Own Kudos:
Given Kudos: 20
Location: Morocco
Schools: Fuqua '23 (II)
GMAT 1: 720 Q48 V42 (Online)
26 Feb 2020, 05:05
Kudos
Bookmarks
The answer D states (D) All hybrids are the descendants of species that are currently extant. Shouldn't it be the opposite??? "that are NOT extent"
