A) nastic movement
B) tropic movement
C) mutation
D) autonomic movement
Correct Answer: A
Solution :
Nastic movement is non directional movement, in which the direction of response or movement is determined by the structure of responsive region. Opening and dossing of the flower is due to the variation in light intensity and is an example of photonasty. Tropic movement is directional paratonic movement of curvature, generally found in cylindrical organ where the direction of movement is related to the direction of stimulus, eg, Geotropfsm, phototropism, hydrotropism. Autonomic movement or self controlled movement is spontaneous movement, eg, special movement shown by stem tip during growth. Mutation is defined as sudden change in genetic material of a cell that may cause it and all cells derived from it to differ in appearance or behaviour from the normal type.
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