论文部分内容阅读
观察红墨水在茎中的运输 选用粗壮、淡绿、半透明状芹菜茎 (约 5ｃｍ长 ,可带叶 )做材料 ,按常规实验方法 ,在阳光下 10分钟 ,即可观察到实验现象。姚鑫睿(北京市十八里店中学 10 0 0 2 3)▲观察质壁分离 取葫芦藓叶 2～ 3片 ,置载玻片水滴中 ,盖片后轻压即可观察。王旭雁(
Observe the transportation of red ink in the stem. Choose thick, light green, translucent celery stems (about 5cm long, with leaves) as the material, according to conventional experimental methods, in the sun for 10 minutes, you can observe the experimental phenomenon. Yao Xinrui (Beijing Shilidian Middle School 10 0 0 2 3) ▲ Observe the plasmolysis. Take 2 to 3 leaves of the gourd, place a slide in the water drop, and gently press the cover to observe. Wang Xuyan (