与往年一样,今年我市卷心菜又喜获丰收。(1)卷心菜有“圆心包

与往年一样,今年我市卷心菜又喜获丰收。

(1)卷心菜有“圆心包”和“牛心包”等不同开关,这种不同的性状是由DNA上的________决定的。从植物分类上看,卷心菜属于______(选填“被子”或“祼子”)植物。

(2)一片菜田就是一个生态系统。阳光、空气、水分等都能影响卷心菜的生长,它们属于__________。施用适量化肥能提高卷心菜产量,但如果一次施肥过多,会引起细胞________,发生“萎蔫”现象。在种植卷心菜过程,需要及时除草、治虫,目的是___________。

 

答案

(1)基因   被子 (2)非生物因素   失水   菜田生态系统的物质和能量更多地流向人类(其他合理答案均可)

解析:略

 

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