用洋葱鳞片叶表皮制备“观察细胞质壁分离实验”的临时装片,观察

用洋葱鳞片叶表皮制备“观察细胞质壁分离实验”的临时装片,观察细胞的变化。下列有

关实验操作和结果的叙述,正确的是(     )

A.将装片在酒精灯上加热后,再观察细胞质壁分离现象

B.在盖玻片一侧滴入清水,细胞吸水膨胀但不会破裂

C.用不同浓度的硝酸钾溶液处理细胞后,均能观察到质壁分离复原现象

D.当质壁分离不能复原时,细胞仍具正常生理功能

答案

  B


解析:

  高浓度的硝酸钾会使细胞脱水死亡,不能再复原;植物细胞由于有细胞壁,不会因吸水过多而胀破。

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