一、初中植物学课本上证明种子萌发需要水分和空气的实验,可以照以下装置演示,直观性强,群明易见。装置方法和用具都很简单,容积100毫升烧杯,玻璃片一块(长10厘米,宽3—4厘米,(蚕豆种子,棉纱线和清水。取三粒大的完整蚕豆种子,先用线拴好每一粒种子,将它顺序固定在玻片上面,种子间上下距离约三厘米,把玻片 First, the junior high school botany textbook to prove the germination of seeds need water and air experiments, according to the following device demonstration, intuitive, group easy to see. Installation method and apparatus are very simple, the volume of 100 ml beaker, a piece of glass (10 cm long, 3-4 cm wide, (broad bean seeds, cotton yarn and water.) Take three large complete beans seed, Each seed, the order of its fixed in the glass slide above the seeds up and down about three centimeters, the slide