Question

Curling of tendrils is due to:

• A. Thigmotropism
• B. Phototropism
• C. Chemotropism
• D. Nyctinasty

Answer 1

The correct option is A Thigmotropism

Tendrils are the thread-like organs of plants which are actually specialized stems, leaves or petioles and used for climbing, support or attaching to another for parasitic growth. Most climbing plants such as vines develop tendrils that tend to coil around the objects that support it. This feature of the tendrils is due to a phenomenon called thigmotropism - directional growth or movement of the curvature in response to stimulus or contact.

So, the correct answer is option A.