Which of the following is NOT well understood by biologists

Câu hỏi :

Read the followingpassage carefully and then choose the best answer to each question.

A. Differences in species richness between temperate and tropical regions 

B. Comparisons of behavior patterns of butterflies and certain animal groups 

C. European butterfly habitats 

D. Differences in species richness within a temperate or a tropical region

* Đáp án

* Hướng dẫn giải

 Đáp án là D. Ý trong bài: Indeed, comparisons of numbers of species among the Amazon basin, tropical Asia, and Africa are still mostly "personal communication" citations, even for vertebrates. In other words, unlike comparison between temperate and tropical areas,

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