問題詳情
19. Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left ina salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are
(A) hypotonic to both fresh water and the salt solution.
(B) hypertonic to both fresh water and the salt solution.
(C) hypertonic to fresh water but hypotonic to the salt solution.
(D) hypotonic to fresh water but hypertonic to the salt solution.
參考答案
答案：C
難度：適中0.666667
統計：A(0),B(0),C(24),D(9),E(0)
用户評論
【Ray】評論
芹菜細胞對於水來說是高張（反過來說水對於細胞是低張）所以水會進入細胞使細胞膨脹變硬芹菜細胞對於鹽水來說是低張（反過來說鹽水對於細胞是高張）所以水會離開細胞使細胞變得鬆軟