The passage suggests that compared to members of the prey groups in“some circumstances,答案解析-雷哥GRE

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As originally formulated, the selfish-herd theory of prey species aggregation assumed that predatory attacks were equally likely to be launched from any position within the environment. In some circumstances (e.g, avian predators attacking prey from above), such an approach is appropriate. However, as James et al. argue, in many predator-prey associations, attacks are unlikely to occur from positions within the group. For example, it is likely that an ambushing predator waiting in the path of a group would be detected before the group moves over its position. Hence, in many ecological situations, predatory attacks on grouped prey will occur exclusively from outside the group. In such circumstances, there is a strong premium to a group member in being in the interior of the group.

The passage suggests that compared to members of the prey groups in“some circumstances," certain members of the prey groups in“many ecological situations" are likely to be less

A.skilled at detecting ambushing predators B.vulnerable to predator attacks C.able to reach escape routes to avoid predators

正确答案： B 耗时：

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当前版本由 314681irjrt 更新于2023-07-13 11:35:32 感谢由 314681irjrt 对此题目的解答所做出的贡献。

题目问跟some circumstances比起来，"many ecological situations的member更..? 根据文章，some circumstances中的member受到的来自各个方向的攻击的可能性是一样的，而many ecological situations的member则不会受到来自群体内部的攻击，所以对比起来，many member是less vulnerable to predator attacks的，B对。A说many member更不能发现predator，以及C更不能逃跑无法比较，不选。

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The selfish-herd theory initially assumed attacks could come from anywhere. However, the passage then argues that in many situations, predators attack from outside the group because those inside would be detected. This means individuals in the interior of the group are less likely to be targeted, thus less vulnerable. Let's look at why the other options are incorrect: A. skilled at detecting ambushing predators: The passage doesn't suggest a difference in detection skills between individuals in different situations. It's about the predator's ability to ambush, not the prey's ability to detect. C. able to reach escape routes to avoid predators: The passage doesn't discuss escape routes. Being in the center of the group might actually hinder reaching an escape route, but that's not the point being made here. The focus is on the likelihood of being attacked in the first place.

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2024-11-25 23:34:24

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