江西省万载县高中生物第3章植物的激素调节3.2生长素的生理作用1教案新人教版必修3.doc

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1 -3.2 生长素的生理作用 1教学目标 概述植物生长素的生理作用重点 概述植物生长素的生理作用难点 概述植物生长素的生理作用教学过程 时间 设计意图 个人备课一、 检查预习检查世纪金榜自主预习【33】完成情况。二、导入新课复习导入三、推进新课1、生长素作用曲线的分析2、生长素的生理作用(1)作用方式(2)生长素作用的特点及其表现(3)影响因素(4)顶端优势现象(5)根的向地性、茎的背地性生长的解释四、课堂训练 例:如图表示生长素浓度对根生长影响的曲线,下列叙述正确的是( ) A.b、c 点对应的均是促进根生长的浓度B.a 点是促进根生长的浓度C.c 点对应的是抑制根生长的浓度D.a、d 点所示生长素的浓度是相同的3130检查预习情况,为讲解新课铺垫。导入新课,口述学习目标讲授分析,掌握植物生长素的生理作用- 2 -答案:A 五、课堂小结六、 作业和预习1、完成课时作业本“课时作业十”2、预习生长素的生理作用第 2 课时641当堂训练,检测知识运用总结本课学习内容,学生记忆相关知识点。布置下节课的预习任务教学反思

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