Which one plant movement is unidirectional?
(c) Both (a) and (b)
The various type of plant movement can be classified as autonomic and paratonic movement. Autonomic movement can be spontaneous and occur on their own while paratonic movement can be induced by stimulant. The paratonic movement man be classified into tropic movement which is caused by external stimuli like light, gravity, touch, water, chemical and electricity and tactic which is induced by chemical heat and radiation, like chemotaxis, phototaxis, thermotaxis and Rheotaxis and nestic movement the taxtic movement is considered unidirectional.