题目内容

收藏纠错

题目材料：

Our study revealed that nest‐guarding long‐tailed skinks (a species of lizard) homed (returned to their nests) more successfully when displaced shorter distances. There are two reasons why homing success rates decreased with increasing displacement distance. One possibility is that females were simply displaced too far to find their way home. However, this is unlikely given that some individuals managed to find their way home from each distance we used. The second possibility deals with trade‐offs between the risks associated with making a long return trip and the benefits of returning. Animals should expend energy only when the associated costs are low. As reptiles increase the time spent moving, their daily energy expenditure increases dramatically. The energetic costs of returning home and the chances that the eggs will have been preyed upon during the return trip both increase substantially as displacement distance increases. For example, the 130 hours (5.5 days) that female skinks spent returning from a distance of 300 meters is sufficient for an egg‐eating snake to locate and prey upon the entire clutch. However, females with larger clutches were more likely to home at distances over 50 meters. For these females, the relative fitness benefits associated with having more eggs successfully hatch may outweigh the energetic costs of returning to a nest site, even if the nest may have already been preyed upon.

The claim in the highlighted sentence assumes which of the following about the individuals that managed to find their way home from each distance?

AThey were less able to detect egg‐eating predators than were the other long-tailed skinks studied.
BThey were more averse to risk than were the other long-tailed skinks studied
CThey expended less energy when homing than did the other long‐tailed skinks studied.
DThey did not possess better homing skills than did the other long-tailed skinks studied.
EThey had significantly smaller clutches than did the other long-tailed skinks studied.

D显示答案

登录后才可以添加做题笔记哦，还没有账号？马上注册

· 相关考点

推断题

以上解析由考满分老师提供。

题目讨论

已经输入 0 个字标记为提问，会有更多小伙伴帮你解答提交

全部讨论

只看提问

按时间排序

按点赞数排序

拓展练习

练习记录

最新提问

题目内容

题目讨论