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在观察植物细胞质壁分离实验时,学生往往撕不好洋葱外表皮,我通过多次实践得出撕取不带叶肉比较完好的外表皮的方法如下:1.先用刀片在洋葱头上切取宽1 cm 左右的洋葱条。2.用刀片在取下的洋葱条内表面往外划,不要把外
When observing the experiment of separating the plant cytoplasmic wall, students often can’t tear the outer skin of the onion. I have practiced repeatedly to obtain the method of tearing the intact outer skin without the mesophyll. The method is as follows: 1. Cut the width of the onion head with a blade firstly. About 1 cm of onion strips. 2. Use a razor blade to remove the outer surface of the removed onion strip.