[問題] 後西醫生物考題

看板Biology (生物學)作者playday (playday)時間10年前 (2015/05/19 13:47)推噓0(0推 0噓 1→)

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【問題】： (D) 69. A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom.Assuming that none of the following genes is absolutely conserved, which of the following would bethe best choice on which to base the phylogeny? (A) genes involved in eye-lens synthesis (B) genes that cause radial body symmetry (C) genes involved in chitin synthesis (D) collagen genes (E) beta-catenin genes (D) 65. All of the followings have contributed to the diversity of organisms on the Hawaiian archipelago EXCEPT that (A) The islands are distant from the mainland. (B) Multiple invasions have occurred. (C) Adaptive radiation has occurred. (D) The islands are very young in geologic time. (E) Environmental conditions differ from one island to the next. (E) 62. Birds and mammals both have negative pressure breathing, but birds are more efficient because of which of the following reasons? (A) The bird’s mouth movements are able to force air into the lungs. (B) The tidal volume in birds is much larger than in a comparably sized mammal. (C) The flow of air in a bird’s lungs is from posterior to anterior. (D) The brain of the bird maximizes oxygen uptake more efficiently. (E) The maximum PO2 is significantly higher in bird lungs. 【問題起因】： 69. 不知(A)(E) 為何不可不是動物也幾乎都有嗎?? 65. (A) 遠大陸的不是也會造成多樣性下降嗎?? 62. (C) 鳥類用前後氣囊造成單一流向為何不可?? PS 第一次po 文在板上看板規好像是可以問問題若不妥立刻刪除 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 219.84.233.244 ※ 文章網址: https://www.ptt.cc/bbs/Biology/M.1432014443.A.DCA.html