[問題] 生物問題~拜託了ORZ~高手們XD

看板post-b.test (後中西醫考試)作者Mrbrowncafe (嬰兒)時間13年前 (2011/06/04 17:59)推噓0(0推 0噓 0→)

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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, 我連題目都看不懂...他是指family(科)比genus(屬)多 variation嗎?) 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 這題沒有給ABC 和DEF之間的關係,...要怎麼比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 小弟想問 (1)A跟B有差嗎??? (2)為何C沒有時間軸?(應該有吧!) (3)為何C可以區分現存種而AB不行?(感覺也可以阿XD) 麻煩大家救救我的演化了楊老師剪貼簿(無誤) 郭公夏五郢書燕說讓我念演化頭痛欲裂目眥盡裂拜託了大家!!!!!XD -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 123.192.59.110