单词：gastraea
音标：[^æs'tri:ә] ；
n. 原肠动物
n. A primeval larval form; a double-walled sac from which,
according to the hypothesis of Haeckel, man and all other animals, that
in the first stages of their individual evolution pass through a
two-layered structural stage, or gastrula form, must have descended.
This idea constitutes the Gastraea theory of Haeckel. See Gastrula.
according to the hypothesis of Haeckel, man and all other animals, that
in the first stages of their individual evolution pass through a
two-layered structural stage, or gastrula form, must have descended.
This idea constitutes the Gastraea theory of Haeckel. See Gastrula.
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发表于:2019-02-18 / 阅读(222) / 评论(0)
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