英语词汇“spiral cleavage”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	spiral cleavage
释义	spiral cleavage spiral cleavage [′spī·rəl ′klē·vij] (embryology) A cleavage pattern characterized by formation of a cell mass showing spiral symmetry; occurs in mollusks. spiral cleavage spiral cleavage the division of cells in the developing animal egg in a spiral manner (see Fig. 109 ). Most invertebrate groups exhibit this type of cleavage with the exception of echinoderms, protochordates and a few smaller groups.
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