Question

Response of a plant towards surface or contact is called:

• A. Phototropism
• B. Geotropism
• C. Thigmotropism
• D. Tropism

Answer 1

The correct option is C

Thigmotropism

The correct option is C

Explanation of the correct option :

1. The movement of plants in response to touch stimulus or contact stimulus or surface stimulus is called thigmotropism.

Explanation of the incorrect options:

Option A

1. Phototropism is one kind of tropic movement in which plants’ shoots bend towards the light.

Option B

1. Geotropism is a type of tropic movement in which plants show their movement towards gravity.
2. Here roots of the plant show positive geotropism (growth towards gravity) and the stems show negative geotropism (growth away from gravity).

Option D

1. In response to different types of environmental stimuli like light, gravity, water, contact, chemical, etc. plants show tropic movements.
2. Tropic movements are growth related movements. They refer to unidirectional and irreversible movements in response to the stimuli.

Final answer: Response of a plant towards surface or contact is called: thigmotropism.