Question

Coiling of garden pea tendrils around any support is an example of ______.

Options

• Thigmotaxis

• Thigmonasty

• Thigmotropism

• Thermotaxis

Answer 1

Coiling of garden pea tendrils around any support is an example of thigmotropism.

Explanation:

Thigmotropism is a directional growth movement that occurs in response to the physical stimulus of touch or contact. When a garden pea tendril makes contact with a solid support, the cells on the side away from the support grow and elongate much faster than those in direct contact. This unequal, differential growth rate causes the tendril to curve, bend, and coil tightly around the object, anchoring the climbing plant.