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一 .单选题 (共 6 0分。每小题只有一个正确选项 )(一 ) 1分题 (共 11题 )1.在细胞有丝分裂间期 ,染色体复制的实质是指… ( )A .染色体数加倍 B .同源染色体数加倍C .染色单体数加倍 D .DNA数加倍2 .北方冬季常绿植物体内矿质养料的运输减弱或近于停止 ,主要原因是 ( )
A. Multiple choice questions (60 points total. There is only one correct option for each question) (a) 1 question (a total of 11 questions) 1. In the mitotic interval of cells, the essence of chromosome replication refers to... () A. Chromosome Number of doubling B. Number of homologous chromosomes doubled C. Number of chromatid doubling D. Number of DNA doubled 2. Transport of mineral nutrients in northern winter evergreen plants decreased or nearly stopped, mainly due to ()