Question

Plants with weak stems like in a cucumber and bitter gourd show

• A. Phtototropism
• B. Thigmotropism
• C. Geotropism
• D. Chemotropism

Answer 1

The correct option is B Thigmotropism

• The stem of the plants like cucumber and bitter gourd are very thin and slender. The stem shows the property of thigmotropism.
• This is the phenomenon in which there is a movement like the bending or the curling of the stem.
• Whenever there is stimulus received in the form of touch, there is curling of the stem and the tendrils of the plant.
• This provides support to the plant in climbing against the surfaces.
• Thus, the correct answer is option B.