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Caldwell, a behavioral ecologist who has spent decades observing these
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23 Jul 2026, 03:01
23 Jul 2026, 03:01
Expert Reply
00:00
Question Stats:
92% (00:57) correct
7% (01:16) wrong based on 13 sessions
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Caldwell, a behavioral ecologist who has spent decades observing these creatures in the caves of Costa Rica, has grown increasingly convinced that vampire bat colonies operate on an economy of favors: bats returning from a successful hunt with blood to spare will regurgitate a portion for roostmates who came back empty-handed, confident that the debt will be repaid on a leaner night, and entire clans have been observed pooling the take from a good evening's foraging so that no single bat's bad luck goes unanswered. Such behavior, Caldwell argues, is best described as _______ rather than merely charitable.
| Two Answers |
|---|
| A. wary |
| B. cooperative |
| C. territorial | D. collaborative | E. solitary |
| F. aloof |
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Re: Caldwell, a behavioral ecologist who has spent decades observing these
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24 Jul 2026, 04:00
24 Jul 2026, 04:00
Expert Reply
Correct Answers: B. cooperative and D. collaborative
The passage describes vampire bats sharing blood with hungry roostmates and repaying the favor later. This is not simply "charitable" (one-sided giving) but is based on mutual exchange and group benefit. Both cooperative and collaborative fit because they imply working together for shared advantage.
Cooperative = acting jointly for mutual benefit
Collaborative = working together toward a common goal
The other choices imply isolation, caution, hostility, or indifference, none of which match the reciprocal sharing described.
The passage describes vampire bats sharing blood with hungry roostmates and repaying the favor later. This is not simply "charitable" (one-sided giving) but is based on mutual exchange and group benefit. Both cooperative and collaborative fit because they imply working together for shared advantage.
Cooperative = acting jointly for mutual benefit
Collaborative = working together toward a common goal
The other choices imply isolation, caution, hostility, or indifference, none of which match the reciprocal sharing described.
gmatclubot
Re: Caldwell, a behavioral ecologist who has spent decades observing these [#permalink]
24 Jul 2026, 04:00
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