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NEET AIPMT SOLVED PAPER 1999

  • question_answer
                The closing and opening of the leaves of Mimosa pudica is due to:                                              

    A)             chemonastic movement                  

    B)             thermonastic movement

    C)             seismonastic movement 

    D)             hydrotropic movement

    Correct Answer: C

    Solution :

                          Seismonastic movements are nastic movements of turgor in response to stimulus of shock (like touch/mechanical/electrical/ thermal/chemical shock). On touching Mimosa pudica, its leaves droop down and the stimulus travels at the speed of 1 cm/sec.


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