Answer: Rapid cell divisions in tendrillar cells that are away from the support
Explanation:
Tendrils are the thin thread-like groups on the stem or leaves of climbing plants. These are sensitive to touch of other parts objects (i.e. Thigmotropic). When a tendril touches an object, then the site in contact with object grows slowly than its other side, (i.e. Rapid cell divisions in cells that are away from the support). This causes the tendril to bend towards the object by growing towards it, wind around object and cling to it.
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