地球上的生物种类达二百多万种,真可谓丰富多彩,纷繁复杂。如此众多的生物之间有无内在联系(即亲缘关系)呢?学生往往缺乏系统完整的了解,因而,提高对此问题的认识,不仅可以使学生从更高层次去理解各个生物类群的结构、功能、生理和行为特点等知识结构,更有助于他们树立生物进化的观点,所以提高本节课的教学质量无疑是非常重要的。下面就此节课的教学谈谈我们的做法及体会。 There are more than two million kinds of creatures on the earth. It is really rich and varied. Is there an internal connection (ie, kinship) between so many organisms? Students often lack systematic and complete understanding. Therefore, raising awareness of this problem can not only enable students to understand the structure of various biological groups from a higher level, Knowledge structures such as function, physiology, and behavioral characteristics are more helpful for them to establish the viewpoint of biological evolution. Therefore, it is undoubtedly important to improve the quality of teaching in this class. Let’s talk about our practices and experiences on the teaching of this lesson.