1. A randomly selected group of organisms from a taxonomic family should show more genetic variation than a randomly selected group from a ______ (A)class (B)genus (C)kingdom (D)order (E)phylum Ans: B (sorry, 我连题目都看不懂...他是指family(科)比genus(属)多 variation吗?) 2. If organisms A, B, C belong to the same phylum, but to different classes and if organism D, E, and F belong to the same class but to different orders, which one of pairs of organisms would be expexted to show the least degree of structural homology? (A) A and B (C) C and F (C) A and F (D) B and D (E) D and F Ans:A 这题没有给ABC 和DEF之间的关系,...要怎麽比XD 3.Match the types of tree diagrams below the description A. Phylogenetic tree B. Phylogram C. Ultrametric tree D. A and B only E. A,B, and C (1) Time is represented along at least one axis of the tree. (2) Branch length indicates amount of change. (3) Branch length distinguishes extant taxa from extinct taxa (4) Provides information only about relative sequence of branch points in time (5) Can provide information about rates of change (6) Can depict phylogeny if based on homologous characters. Ans: (1)E (2)B (3)C (4)A (5)D (6)E 小弟想问 (1)A跟B有差吗??? (2)为何C没有时间轴?(应该有吧!) (3)为何C可以区分现存种而AB不行?(感觉也可以阿XD) 麻烦大家救救我的演化了 杨老师剪贴簿(无误) 郭公夏五 郢书燕说 让我念演化 头痛欲裂 目眦尽裂 拜托了大家!!!!!XD --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 123.192.59.110