作者bluemagpie (贞心相廷)
看板TransBioChem
标题生物问题请教
时间Sun Apr 24 20:11:33 2011
1.Which process hinder clarification of the deepest branchings in a
phylogenetic tree that depicts the origins of the tree domains?
(A)binary fission (B)mitosis (C)meiosis (D)horizontal gene transfer
(E)gene duplication
答案是给D不晓得这题答案要如何去解释呢
2.Tree living spices X, Y, and Z share a common ancestor T, as do extinct
spices U and V. Agrouping that includes spices T, X, Y,and Z makes up
(A)a valid taxon (B)a monophyletic clade (C)an ingroup, with spices Uas
the outgoup (D)a paraphyletic group (E)a polyphyletic group
答案是给D但是E为什麽错呢
烦请高手解答谢谢
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1F：推 iamdada:你看的问题好难喔...考试会考吗 @@ 04/24 20:14
2F：→ confused7749:这个好像没有很难耶 04/24 20:33
3F：推 confused7749:我记得在普生讲亲缘关系那边有讲到第一题的观念 04/24 21:16
4F：→ confused7749:第二题的画就回去搞懂每个分类学的定义 所以才说不难 04/24 21:16