题目内容双击单词支持查询和收藏哦～

题目材料：

Predators of herbivores can influence the structure and dynamics of plant communities in two ways: by reducing herbivore density or by modifying herbivore behavior. Whereas density-mediated effects generally affect all plants, behavioral effects often cause herbivores to change their relative use of different parts of their habitat. This can lead to a redistribution of herbivore damage on different plant species, for example, when plant-eating insects shift from preferred but risky plant species to less nutritious plants that offer refuge. A well-documented example involves predatory nursery-web spiders-a species that typically inhabits only the upper canopy of grasses. In systems where the spiders are present, grasshoppers shift their feeding activity toward ground level, thereby increasing the relative consumption of goldenrod over Kentucky bluegrass.

The passage suggests which of the following about grasshoppers?

A.In the absence of certain predators, they are more likely to eat Kentucky bluegrass than to eat goldenrod.
B.When many predators are present, they typically eat only the most nutritious plants available.
C.When their population density is reduced, they tend to eat less nutritious plants.
D.They are the preferred prey of nursery-web spiders.
E.They prefer to eat plants located near ground level.

A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

信息题-信息本身及合理推断

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

题目内容双击单词支持查询和收藏哦～

题目讨论