The composing of embryo proteins and rule of gene sequential expression at protein level can be discussed by researching the proteins of every embryo development stage of silkworm.
通过家蚕各个时期胚胎蛋白质的研究，可以从蛋白质水平探讨胚胎蛋白质的构成和基因顺序表达的规律。
The ensuing gene expression profile in the cleavage-stage embryo establishes totipotency and is required for further development.
随后卵裂时期胚胎的基因表达模式将建立一种全能性，这对进一步发育是必需的。
The sensitive period was at late stage during the embryo development.
雌蚕高温干燥条件的敏感性，主要发生在胚胎发育至后期阶段。
Up to now, human embryonic stem cells have been derived at a later stage of development when the embryo consists of about 150 cells.
到目前为止，人类胚胎干细胞都来自于发育比较晚的的阶段，那个时候胚胎大约有150个细胞。
Therefore, the embryo dormancy is acquired in late stage of seed development.
因此，胚休眠主要在发育后期获得。
Conclusions The sequential culture system was beneficial for mouse embryo development and differentiation from early embryo stage to blastocyst stage.
结论序列培养系统有利于鼠胚从早期胚胎向囊胚的进一步发育和分化。
Comparative observation with light microscopy and scanning electron microscopy shows: the hatching gland occurs at stage of embryo development.
观察结果表明，胚胎发育期有孵化腺发生。
Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.
大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.
大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
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