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高中生物，1，2，4题求解释

2025-04-07 20:13:23

推荐回答（1个）

回答1：

1。题目说地沟油的主要成分是脂质，脂质的组成元素是CHO，不一定还有N。B错，主要的能源物质应是糖类。D细胞的糖蛋白减少只有当该细胞变成了癌细胞之后才会。致癌不一定成癌。2。A 诱变育种具有不定向性可能得到所需的品种，B花粉离体培养只会生成花药中所含基因进行加倍然后生成纯种的植株，不会发生突变生出抗锈植株C 可以，用含抗锈高杆植物细胞融合D基因工程，不用解释了吧 4 AB看图可知。高浓度的乙烯会使叶子脱落率下降，C选项是有促进有对抗。

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