Tropic movement is due to

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(A) Tropic movements are growth-related movements in plants,such as phototropism or geotropism. These movements occur due to the differential growth o

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Cell elongation

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(A) Tropic movements are growth-related movements in plants,such as phototropism or geotropism. These movements occur due to the differential growth of cells on opposite sides of an organ,which is primarily caused by cell elongation. Cell division may occur in the meristematic regions,but the actual bending or movement towards or away from a stimulus is driven by the elongation of cells.

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