对“根的结构”进行探索式教学 ,关键是做好两个实验 ,即“幼根外形的观察”和“根尖永久纵切片的观察”。由学生动手实验 ,观察 ,总结 ,并上升到理论的高度然后投入实际应用 ,依据学生的认知心理 ,整堂课以“根的生长”为主线 ,渗透“结构与功能相适应”的观点 ,最后以“适应 The key to conducting an exploratory teaching of “root structure” is to do well in two experiments, namely “the observation of the shape of the young root” and “the observation of the permanent longitudinal section of the root tip”. Students start hands, observe, summarize, and rise to the height of theory and then put it into practical use. According to the cognitive psychology of students, the entire class takes the “root growth” as the main line, permeating the viewpoint of “adaptation of structure and function”. Finally with "adaptation