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“受精和果实种子的形成”这节内容是教材中的重点和难点,这一生理过程是很复杂的,在日常生活中又见不到,摸不着,也无法让学生观察到。因此究竟采用怎样的教学方法,使学生在一节课内就能正确地牢固地掌握这部分基础知识,进行这方面的探讨和研究,就显得十分重要,并为以后在高中学习“生殖发育”有关知识奠定基础。一、教学目的: 1.在学生已掌握花的构造和传粉等知识的基础上,通过本节课的教学,使学生了解绿色开花植物受精作用的特点,并懂得传粉和受精作用是子房发育成果实,胚珠发育成种子的必要条件。2.使学生了解人们掌握了传粉和受精作用的规律后,可进行杂交育种。
The content of “fertilization and fruit seed formation” is the key and difficult point in the textbook. This physiological process is very complicated. Therefore, what kind of teaching methods are used to enable students to correctly and firmly grasp this basic knowledge within a class, and it is very important for them to carry out discussion and research in this area, and to learn “reproductive development” in high school later. Lay the foundation for knowledge. First, the purpose of teaching: 1. On the basis of students have mastered the structure of flowers and pollination and other knowledge, through the teaching of this lesson, so that students understand the characteristics of green flowering plants fertilization, and know that pollination and fertilization is ovary development Achievements are the necessary conditions for the development of ovules into seeds. 2. To enable students to understand that people have mastered the rules of pollination and fertilization, crossbreeding can be carried out.