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According to the passage, what causes potassium and water in the mimosa to shift from some cells to others?A.Signals from the pulvini.B.Movements of the leaf stalks.C.Electrical impulses.D.Nerve signals.

A.Signals
B.B.Movements
C.C.Electrical
D.D.Nerve

【参考答案】

C

[注释] 第二段第四句This causes potassium．．．中的......

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It can be inferred from the passage that the mimosa is called the sensitive plant because it ______.A.reacts to outside stimulationB.has smaller leaves than most other plantsC.depends on organs called pulviniD.contains potassium and water

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