论文部分内容阅读
启发式教学可启迪学生思维,开发学生智力。反问法是启发式教学的一种具体运用,可以调动起学生潜在的思维积极性。现举两例。例1.高等植物和高等动物个体发育都是从受精卵开始的。这种说法为什么不对? 当学生提出这个问题之后,可以不正面解答,而是提出几个问题让学生思考: ①雄蜂个体发育的起点是什么?(未受精的卵细胞) ②高等植物经营养生殖直接产生新个体时,个体发育的起点是什么?(营养器官) ③高中《生物》教材讲到生物进化的证据时,有这样一句:“人们很早就注意到,所有的高等生物(如脊椎动物和种子植物)的胚胎发育都是从一个受精卵开始的”。这里为什么说“胚胎发育”,而不说“个体发育”?
Heuristic teaching can inspire students ’thinking and develop students’ intelligence. Quiz method is a specific application of heuristic teaching, which can arouse students’ potential thinking motivation. Cite two cases. Example 1. Higher plants and higher animals develop individually from fertilized eggs. When the students put forward this question, you can not answer it positively, but put forward several questions for the students to think: ① What is the starting point of the individual development of the drone? (Unfertilized egg cells) ② Higher plants are directly recuperating (Vegetative organs) ③ high school “biology” textbook Speaking of evidence of biological evolution, there is such a sentence: “It has long been noted that all the higher organisms (such as vertebrates And seed plants) all begin with a fertilized egg. ” Why do you say “embryo development”, not to say “individual development”?