题目

（07黄冈中学、襄樊四中联考）进行植物体细胞杂交，首先需要除去细胞壁。现提供以下材料和用具：白色洋葱鳞片叶、紫色洋葱鳞片叶、适宜浓度的盐酸、适宜浓度的蔗糖液、纤维素酶、果胶酶、蒸馏水和镊子，显微镜、载玻片、盖玻片等。请你从中选取合适的材料配制成合理的细胞壁分解液，并设计出检验它除去细胞壁的方法和步骤，预测和解释实验的结果。（1）实验步骤：①配制细胞分解液：选取                      配制成细胞壁—Daniel, I am still not sure .—Why not? No one is better than you in our class.A. how I can prepare for the competitionB. where I can go to apply for the competitionC. whether I should take part in the competition or notD. who I can ask for more information about the competition