植物细胞分裂时,发生变化最重要、最明显的结构是(    ) A.细

植物细胞分裂时,发生变化最重要、最明显的结构是(   

A.细胞膜       B.细胞核        C.细胞壁         D.细胞质

答案

解析:在细胞分裂时,先是一个细胞核分裂为两个细胞核,细胞核里的遗传物质经过复制而数量加倍,并且平均分配到两个新细胞中,然后细胞质再分裂。

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