Question : When we touch leaves of "Touch me not plant", they close, these movements are called
Option 1: photonastic movements
Option 2: nyctinastic movements
Option 3: seismonastic movements
Option 4: chemotactic movements
Correct Answer: seismonastic movements
Solution : The correct option is seismonastic movements.
When the leaves of the "Touch me not plant" (Mimosa pudica) are touched, they make " seismonastic movements ". Seismonastic motions are reversible and quick reactions to mechanical stimuli like touch or vibration. When the leaves of Mimosa pudica are touched, they quickly close or fold together. This is a defence mechanism used by the plant to protect itself from possible predatory herbivores.
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