1图1为玉米粒的纵剖面结构示意图请回答�图中1是种皮和果皮种皮和果皮具有保护保护作用.�图中77胚胚是新植物的幼体.�菜豆 Template




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tomski1图1为玉米粒的纵剖面结构示意图请回答�图中1是种皮和果皮种皮和果皮具有保护保护作用.�图中77胚胚是新植物的幼体.�菜豆 coloring