【单选题】【消耗次数：1】
DNA绝大部分存在于
①
细胞核染色体中
②
线粒体
③
植物叶绿体
④
细胞浆
⑤
细胞膜
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【简答题】
植物细胞有丝分裂时，染色体排列在细胞中央的赤道面上，是[填空(1)]期。
【简答题】
根据细胞核和细胞器的有无，而将植物界的细胞分为[填空(1)]和[填空(2)]。
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