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细胞是一般生物体的基本结构,它由细胞核和细胞质组成。细胞核和细胞质在结构上和机能上很有区别。因此有人提出细胞里存在着两个代谢系统的看法。究竟细胞的代谢系统是一个呢?还是两个?另一方面,—个受精卵通过若干次卵割(即卵的细胞分裂),形成胚胎,由此发育成个体。细胞遗传学家一般认为,同一个体的不同细胞含有相似的细胞核,两个体发育过程中所看到的细胞分化是细胞质的
Cell is the basic structure of the general organism, which consists of the nucleus and the cytoplasm. The nucleus and cytoplasm are structurally and functionally different. Therefore, it was suggested that there are two metabolic systems in cells. Whether the cell’s metabolic system is one or two? On the other hand, a fertilized egg forms embryos by several cycles of egg cleavage (ie, egg cell division), thereby developing into an individual. It is generally believed by cytogenetics that different cells of the same individual contain similar nuclei, and cell differentiation seen during development of both individuals is cytoplasmic