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LIFE MOVEMENT IN PLANTS
In following the characteristic variations of response,
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Life_Movements_in_Plants_Vol_1_Fig_23.jpg/1000px-Life_Movements_in_Plants_Vol_1_Fig_23.jpg)
Fig. 23. Record for twenty-four hours, exhibiting diurnal variation of excitability (spring specimen). The displacement of base-line is due to nyctitropic movement.
occurring throughout the day, we find that while they