Question

Thigmonastic movement is found in

• A. Drosera
• B. Nepenthes
• C. Oxalis
• D. Albizzia

Answer 1

The correct option is D

Albizzia

The correct option is option D.

Explanation of the correct option:

1. The phenomenon of changing position in response to external stimuli such as light or touch is known as thigmonastic movement.
2. Thigmonastic movement is shown by some plants and fungi in response to touch.
3. Thigmonastic movement is nastic movement and non - directional.
4. The leaves of Albizia (related genus to Mimosa) exhibit thigmonastic movement.
5. In Thigmonastic movement is, the leaves of plants get closed when stimuli touch.

Explanation of the incorrect option:

Option A:

1. Drosera exhibits haptonastic movement.
2. In Drosera, the tentacles on leaves bend towards the direction of the insect after coming into contact with it.

Option B:

1. Nepenthes is a carnivorous plant.
2. It traps insects or prey through its mouth.
3. Nepenthes does not show thigmonastic movement.

Option C:

1. Oxalis exhibit photo nasty movement in response to sunlight.
2. Photonasty is the type of movement in which a plant responds to sunlight by opening and closing flowers or growth on one side of the axis changes to the other side.

Hence, thigmonastic movement is found in Albizzia.