单选题:关于细胞分化的叙述,下列哪一项是错误的?(  )

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题目内容:

关于细胞分化的叙述,下列哪一项是错误的?(  ) A.细胞分化是一种持久性的变化,它发生在生物体的整个生命进程中
B.细胞分化在胚胎时期达到最大限度
C.随着细胞分化的进行。细胞中的遗传物质种类会发生变化
D.高度分化的动物细胞的细胞核保持着全能性

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