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【典型例题的解析】例1花青素在酸性和碱性条件下,会呈现出不同的颜色。给你提供紫色洋葱作实验材料,请使用显微镜和必备用具设计一个简单实验,证明以上结论。写出简要的实验步骤并对结果进行分析。实验步骤:(1)取洋葱_____________,制作临时装片;(2)_____________;(3)________
[Analysis of Typical Examples] Example 1 Anthocyanins show different colors under acidic and alkaline conditions. To provide you with purple onion as an experimental material, please use a microscope and necessary tools to design a simple experiment to prove the above conclusions. Write brief experimental steps and analyze the results. Experimental procedure: (1) Take the onion _____________ and make a temporary film; (2) _____________; (3) ________