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Question
What kind of movement is displayed by the plants in the images?
What kind of movement is displayed by the plants in the images?
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Solution
The correct option is B Thigmonastic, Thigmotropic
Tropic responses are movements of plant parts towards or away from stimuli.
Nastic responses are rapid movements of plant parts, in response to stimuli but independent of the direction of stimuli.
In illustration 1, the stimulus is touch. As the touch-me-not plant folds irrespective of the direction of touch, it exhibits thigmonastic movement. In illustration 2 the vine/climber grows towards the support, it is thigmotropic movement.
Tropic responses are movements of plant parts towards or away from stimuli.
Nastic responses are rapid movements of plant parts, in response to stimuli but independent of the direction of stimuli.
In illustration 1, the stimulus is touch. As the touch-me-not plant folds irrespective of the direction of touch, it exhibits thigmonastic movement. In illustration 2 the vine/climber grows towards the support, it is thigmotropic movement.
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