单项选择题

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.
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单项选择题
A．likeB．sameC．beingD．as
A．like
B．same
C．being
D．as
单项选择题
It can be inferred from the passage that the mimosa is called the sensitive plant because it ______.
A．reacts to outside stimulation
B．has smaller leaves than most other plants
C．depends on organs called pulvini
D．contains potassium and water
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