用放射性同位素分别标记u和t的培养基培养蚕豆根尖分生区细胞观察其有丝分裂�期为20小时根据这两种碱基被细胞利用的速率绘制成的曲线如下图所 Template




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tomski用放射性同位素分别标记u和t的培养基培养蚕豆根尖分生区细胞观察其有丝分裂�期为20小时根据这两种碱基被细胞利用的速率绘制成的曲线如下图所 coloring