试题与答案

如下图所示,在第①组的胚芽鞘套上不透光的锡纸小帽,在第②、③、④组胚芽鞘的各部位插入

题型:问答题 简答题

题目:

如下图所示,在第①组的胚芽鞘套上不透光的锡纸小帽,在第②、③、④组胚芽鞘的各部位插入云母片(不允许生长素穿过),沿箭头方向给予单侧光照射。

(1)请根据上述条件分别说明①。④组胚芽鞘的生长情况。

 

①________________________________;

②________________________________;

③________________________________;

④________________________________。

(2)以上实验说明,感受光刺激的部位在______,向光弯曲生长的部位在______。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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