翻訳と辞書 Words near each other ・ Embrun, Ontario ・ Embrunman ・ Embry ・ Embry Hills, Georgia ・ Embry, Pas-de-Calais ・ Embrya ・ Embryo ・ Embryo (1976 film) ・ Embryo (band) ・ Embryo (Dir En Grey song) ・ Embryo (disambiguation) ・ Embryo (Pink Floyd song) ・ Embryo cryopreservation ・ Embryo culture ・ Embryo donation ・ Embryo drawing ・ Embryo quality ・ Embryo Records ・ Embryo rescue ・ Embryo space colonization ・ Embryo splitting ・ Embryo transfer ・ Embryocardia ・ Embryogenesis ・ Embryoglossa ・ Embryoglossa aethiopicalis ・ Embryoglossa bipuncta ・ Embryoglossa submarginata ・ Embryoglossa variegata ・ Embryoid body Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Embryo drawing ： ウィキペディア英語版 Embryo drawing Embryo drawing is the illustration of embryos in their developmental sequence. In plants and animals, an embryo develops from a zygote, the single cell that results when an egg and sperm fuse during fertilization. In a big head of DAB which forms a ball of cells, ±then forms a set of tissue layers that migrate and fold to form an early embryo. Images of embryos provide a means of comparing embryos of different ages, and species. To this day, embryo drawings are made in biology undergraduate developmental biology lessons. Comparing different embryonic stages of different animals is a tool that can be used to infer relationships between species, and thus biological evolution. This has been a source of quite some controversy, both now and in the past. Ernst Haeckel pioneered in this field. By comparing different embryonic stages of different vertebrate species, he formulated the Recapitulation theory. This theory states that an animal's embryonic development follows exactly the same sequence as the sequence of its evolutionary ancestors. Haeckel's work and the ensuing controversy linked the fields of developmental biology and comparative anatomy into comparative embryology. From a more modern perspective, Haeckel's drawings were the beginnings of the field of evolutionary developmental biology (evo-devo). The study of comparative embryology aims to prove or disprove that vertebrate embryos of different classes (e.g. mammals vs. fish) follow a similar developmental path due to their common ancestry. Such developing vertebrates have similar genes, which determine the basic body plan. However, further development allows for the distinguishing of distinct characteristics as adults. ==Use of embryo drawings and photography in contemporary biology== In current biology, fundamental research in developmental biology and evolutionary developmental biology is not driven anymore by morphological comparisons between embryos, but more by molecular biology. This is partly because Haeckel's drawings were very inaccurate. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Embryo drawing」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.