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Register now and save up to $200 Available with Beat the GMAT members only code ## Grassland Songbirds This topic has 1 expert reply and 4 member replies gmat740 MBA Student Joined 16 Aug 2008 Posted: 1194 messages Followed by: 15 members Upvotes: 71 GMAT Score: 710 #### Grassland Songbirds Fri Aug 07, 2009 10:32 pm Grassland songbirds often nest in the same grassland-wetland complexes as waterfowl, particularly in a certain part of those complexes, namely, (5) upland habitats surrounding wetlands. Although some wildlife management procedures directed at waterfowl, such as habitat enhancement or restoration, may also benefit songbirds , the impact (10) of others, especially the control of waterfowl predators, remains difficult to predict. For example, most predators of waterfowl nests prey opportunistically on songbird nests, and removing (15) these predators could directly increase songbird nesting success. Alternatively, small mammals such as mice and ground squirrels are important in the diet of many waterfowl-nest (20) predators and can themselves be important predators of songbird nets. Thus. Removing waterfowl-nest predators could affect songbird nesting success through subsequent increases (25) in small-mammal populations. In 1995 and 1996, researchers trapped and removed certain waterfowlnest predators. primary raccoons and striped skunks, then observed subse- (30) quent survival rates for songbird nests. Surprisingly. They observed no significant effect on songbird nesting success. This may be due to several factors. Neither raccoons nor striped (35) skunks consume ground squirrels, which are important predators of songbird nests. Thus, their removal may not have led to significant increases in populations of smaller predators. (40) Additionally, both raccoons and striped skunks prefer wetlands and spend little time in upland habitats; removing these species may not have increased the nesting success of songbirds in the uplands enough to allow detection. ------------------------------------------------------------------------------------- Q 13:According to the passage, which of the following is true about the role played by ground squirrels in the ecology of grassland-wetland complexes? A. While not important in the diet of raccoons or striped skunks, ground squirrels are a significant source of food for other waterfowl-nest predators. B. Whereas ground squirrels are typically important as predators of songbird nests, their opportunistic predation on waterfowl nests also has an observable effect on waterfowl nesting success. C. Although most waterfowl-nest predators prey on small mammals such as mice and ground squirrels, populations of ground squirrels tend to increase quickly enough to compensate for this level of predation. D. Although ground squirrels have been known to prey on songbird nests, a larger portion of their diets is usually provided by predation on waterfowl nests. E. Since larger predators tend to prefer small mammals to songbird eggs as a food source, a large population of ground squirrels plays an important role in controlling opportunistic predation on songbird nests. Answer: ------------------------------------------------------------------------------------- Q 15: The primary purpose of the passage is to A. describe some procedures used for wildlife management and consider some problems associated with the execution of those procedures B. outline a problem related to a wildlife management procedure and offer potential explanations for the results of an experiment bearing on that problem C. present experimental results that illustrate the need for certain wildlife management procedures and point out some inconsistencies in those results D. argue that a certain procedure used for wildlife management should be modified because of its unintended consequences E. propose that further experiments be performed to assess the long-term effects of certain wildlife management procedures I am not sure whether the OA's are correct or not. I am posting this question just to verify the OA's and to know my mistake OA=> 13A, 15B IMO=>13E, 15 C Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums! nishatfarhat87@gmail.com Master | Next Rank: 500 Posts Joined 24 Jun 2012 Posted: 206 messages Followed by: 3 members Upvotes: 5 Top Reply Tue Feb 28, 2017 12:00 pm [quote="RadiumBall"]I think the OP missed the 14th question which is where I got wrong So here it is: Q 14: Which of the following best describes the function of the sentence “Neither raccoons…songbird nests” (lines 34-37) in the context of the passage as a whole? A. It raises questions about the validity of a theory described in the first paragraph. B. It points out an oversimplification that is inherent in the argument presented in the first paragraph. C. It introduces information that may help explain the results of the experiment that are presented earlier in the paragraph. D. It provides a specific example of the type of data collected in the experiment described earlier in the paragraph. E. It anticipates a potential objection to the conclusions drawn by the researchers involved in the experiment described earlier in the paragraph. OA: C Hi Experts, Can you please highlight why E is incorrect? ### GMAT/MBA Expert DavidG@VeritasPrep Legendary Member Joined 14 Jan 2015 Posted: 2457 messages Followed by: 115 members Upvotes: 1153 GMAT Score: 770 Top Reply Thu Mar 02, 2017 3:23 pm [quote="nishatfarhat87@gmail.com"] RadiumBall wrote: I think the OP missed the 14th question which is where I got wrong So here it is: Q 14: Which of the following best describes the function of the sentence “Neither raccoons…songbird nests” (lines 34-37) in the context of the passage as a whole? A. It raises questions about the validity of a theory described in the first paragraph. B. It points out an oversimplification that is inherent in the argument presented in the first paragraph. C. It introduces information that may help explain the results of the experiment that are presented earlier in the paragraph. D. It provides a specific example of the type of data collected in the experiment described earlier in the paragraph. E. It anticipates a potential objection to the conclusions drawn by the researchers involved in the experiment described earlier in the paragraph. OA: C Hi Experts, Can you please highlight why E is incorrect? The author predicts the following chain of events removal of waterfowl predators ---> proliferation of small animals ---> negative impact on songbird nesting But the removal of the waterfowl predators doesn't have the predicted impact. Lines 34-37 help explain why the predicted impact didn't happen. There's no potential objection to a conclusion. In other words, no one is refuting an idea in the abstract. There's just an experiment with an unexpected result that requires an explanation. _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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nishatfarhat87@gmail.com Master | Next Rank: 500 Posts
Joined
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Posted:
206 messages
Followed by:
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Tue Feb 28, 2017 12:00 pm
[quote="RadiumBall"]I think the OP missed the 14th question which is where I got wrong

So here it is:

Q 14:
Which of the following best describes
the function of the sentence “Neither
raccoons…songbird nests” (lines 34-37)
in the context of the passage as a whole?
A. It raises questions about the validity of a
theory described in the first paragraph.
B. It points out an oversimplification that is
inherent in the argument presented in
the first paragraph.
C. It introduces information that may help
explain the results of the experiment
that are presented earlier in the
paragraph.
D. It provides a specific example of the
type of data collected in the experiment
described earlier in the paragraph.
E. It anticipates a potential objection to the
conclusions drawn by the researchers
involved in the experiment described
earlier in the paragraph.

OA: C

Hi Experts,

Can you please highlight why E is incorrect?

### GMAT/MBA Expert

DavidG@VeritasPrep Legendary Member
Joined
14 Jan 2015
Posted:
2457 messages
Followed by:
115 members
1153
GMAT Score:
770
Thu Mar 02, 2017 3:23 pm
[quote="nishatfarhat87@gmail.com"]
I think the OP missed the 14th question which is where I got wrong

So here it is:

Q 14:
Which of the following best describes
the function of the sentence “Neither
raccoons…songbird nests” (lines 34-37)
in the context of the passage as a whole?
A. It raises questions about the validity of a
theory described in the first paragraph.
B. It points out an oversimplification that is
inherent in the argument presented in
the first paragraph.
C. It introduces information that may help
explain the results of the experiment
that are presented earlier in the
paragraph.
D. It provides a specific example of the
type of data collected in the experiment
described earlier in the paragraph.
E. It anticipates a potential objection to the
conclusions drawn by the researchers
involved in the experiment described
earlier in the paragraph.

OA: C

Hi Experts,

Can you please highlight why E is incorrect?
The author predicts the following chain of events

removal of waterfowl predators ---> proliferation of small animals ---> negative impact on songbird nesting

But the removal of the waterfowl predators doesn't have the predicted impact. Lines 34-37 help explain why the predicted impact didn't happen. There's no potential objection to a conclusion. In other words, no one is refuting an idea in the abstract. There's just an experiment with an unexpected result that requires an explanation.

_________________
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Veritas Prep Reviews
Save \$100 off any live Veritas Prep GMAT Course

Enroll in a Veritas Prep GMAT class completely for FREE. Wondering if a GMAT course is right for you? Attend the first class session of an actual GMAT course, either in-person or live online, and see for yourself why so many students choose to work with Veritas Prep. Find a class now!
HSPA Legendary Member
Joined
28 Jan 2011
Posted:
1101 messages
Followed by:
13 members
47
Target GMAT Score:
720
GMAT Score:
640
Wed Mar 09, 2011 2:11 am
13)
Ignore E- The problem with this is "large population of ground squirals" they will eat on song bird nests... so they cannot play a role in controlling predation.

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