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Grassland Songbirds

This topic has 1 expert reply and 4 member replies
gmat740 MBA Student
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Grassland Songbirds

Post Fri Aug 07, 2009 10:32 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    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

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    Post Sat Aug 08, 2009 10:28 am
    gmat740 wrote:
    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. for this please refer to the boldfaced statements in line 17 and 34
    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 problem is outlined in boldfaced lines 6-11 and after line 31 the entire passage talks about the result and its explanation.
    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

    RadiumBall Master | Next Rank: 500 Posts Default Avatar
    Joined
    02 Dec 2010
    Posted:
    132 messages
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    5 times
    Post Tue Mar 08, 2011 6:29 pm
    I think the OP missed the 14th question which is where I got wrong Sad

    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

    I wonder how?

    HSPA Legendary Member
    Joined
    28 Jan 2011
    Posted:
    1101 messages
    Followed by:
    13 members
    Thanked:
    47 times
    Target GMAT Score:
    720
    GMAT Score:
    640
    Post 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.

    nishatfarhat87@gmail.com Master | Next Rank: 500 Posts
    Joined
    24 Jun 2012
    Posted:
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    3 members
    Thanked:
    5 times
    Post Tue Feb 28, 2017 12:00 pm
    [quote="RadiumBall"]I think the OP missed the 14th question which is where I got wrong Sad

    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?

    Post 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 Sad

    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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