在中学生物与环境一章的教学中，教师可以组织学生开展课外生物实验。运用实验室现有化学试剂，如苯酚、亚硝酸钠等，配制不同剂量染毒液，对蚕豆根尖进行微核实验，让学生在显微镜下观察到微核现象，初步认识环境中水污染的剂量关系及微核监测技术，通过理论与实践相结合的素质教育，增强中学生环境保护意识 In the teaching of biology and environment in middle schools, teachers can organize students to conduct extra-curricular biology experiments. The use of laboratory chemical reagents, such as phenol, sodium nitrite, etc., preparation of different doses of venom, micronucleus experiments on Vicia faba root tip, so that students observe the phenomenon of micronuclear microscopy, a preliminary understanding of the environmental dose of water pollution Relationship and micronuclear monitoring technology, through the combination of theory and practice of quality education, to enhance the awareness of environmental protection of middle school students