题目内容双击单词支持查询和收藏哦～

题目材料：

Two dramatic shifts in upstate New York's microfossil record may explain the fate of the region's prehistoric megafauna. First, fossil spores of Sporormiella, a fungus common in most Pleistocene era sediments that grows only on the dung of large herbivores, vanish from the sedimentary record about 14,000 years ago. Soon after, levels of microscopic charcoal from landscape fires increase more than tenfold. Paleontologist Guy Robinson sees a connection: he suggests that local populations of mastodons and other big herbivores crashed when the first humans arrived and found the animals, previously unexposed to humans, easy prey. With most of the huge herbivores wiped out, fire-fueling vegetation accumulated on the landscape. So fires lit by the human newcomers burned hotter and spread farther than ever before.

It can be inferred that Robinson would most likely agree with which of the following claims about fossil Sporormiella spores?

A. They should appear in the microfossil record in inverse proportion to megafauna fossils.
B. They should be more plentiful in the microfossil record during periods when microscopic charcoal is also plentiful.
C.They provide evidence about the timing of the first humans' appearance in upstate New York.
D. They may have been eliminated from the microfossil record at times because they were destroyed by intense fires.
E.They tend to decline in the microfossil record during periods in which megafauna populations increased.

C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

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