笔者就初中生物“观察种子的结构”、“馒头在口腔中的变化”和“观察植物的细胞结构”等几个实验的改进谈谈具体实施方法。一、“观察种子的结构”实验的改进实验目的:认识双子叶种子和单子叶种子的结构。实验材料:浸软的菜豆或花生种子,浸软的玉米或小麦种子、刀片、放大镜、滴管、稀碘液。实验步骤:菜豆或花生种子的观察(略)。观察玉米的结构:首先,取一粒浸软的玉米种子 The author of junior high school biology “to observe the structure of the seed”, “bread in the mouth of the changes” and “observe the cell structure of plants,” and several other experimental improvements to talk about the specific implementation methods. First, “Observing the structure of the seed ” Experiment Improvement Objective: To recognize the structure of dicotyledons and monocotyledons. Experimental materials: soaked bean or peanut seeds, macerated corn or wheat seeds, blades, magnifying glass, eyedropper, dilute iodine. Experimental steps: observation of beans or peanut seeds (omitted). To observe the structure of corn: First, take a marsh corn seed