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# Many birds that form flocks compete through aggressive

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SVP
Joined: 05 Apr 2005
Posts: 1712
Followers: 5

Kudos [?]: 79 [0], given: 0

Many birds that form flocks compete through aggressive [#permalink]

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30 May 2005, 23:03
Many birds that form flocks compete through
resources such as food and shelter. The result of
repeated interactions between flock members is that
(5) each bird gains a particular social status related to its
increasing with higher status. As the number and
intensity of interactions between birds increase,
however, so increase the costs to each bird in terms of
(10) energy expenditure, time, and risk of injury. Thus,
birds possessing attributes that reduce the number of
costly interactions in which they must be involved,
without leading to a reduction in status, are at an
advantage. An external signal, such as a plumage type,
(15) announcing fighting ability and thereby obviating the
actual need to fight, could be one such attribute.
The zoologist Rohwer asserted that plumage
variations in â€œHarris sparrowsâ€
Director
Joined: 01 Feb 2003
Posts: 847
Followers: 4

Kudos [?]: 108 [0], given: 0

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30 May 2005, 23:33
Looks like I would have made more mistakes than I should!
Total Time: 13 min
first, second and third questions: 2 min each (rest I didn't record)
1 B
2 A
3 B
4 B
5 E
6 D
7 A
SVP
Joined: 05 Apr 2005
Posts: 1712
Followers: 5

Kudos [?]: 79 [0], given: 0

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31 May 2005, 19:28
Anymore????????????????????????

May be because of long passage, most are not interested.
31 May 2005, 19:28
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