Question

Mimosa pudica shows an example of

• A. phototropism
• B. chemotropism
• C. geotropism
• D. nastic movement

Answer 1

The correct option is D

nastic movement

The correct option is D.

Explanation for correct option-

1. Mimosa pudica (touch me not plant) shows nastic movement.
2. Nastic movement is the response of the parts of the plants, which is independent of the direction of the external stimulus.
3. Mimosa pudica leaves fold up and droop immediately in response to an external stimulus (touch) but come back to their normal form after some time.

Explanation for incorrect options-

Option A:

1. Phototropism is the directional growth movement of curvature exhibited by plants in response to light.
2. Sunflower exhibits phototropism.

Option B:

1. Chemotropism is the directional growth movement of curvature exhibited by plants in response to certain chemicals.
2. The growth of the pollen tube within the ovary is an example of chemotropism.

Option C:

1. Geotropism is the directional growth movement of curvature exhibited by plants in response to gravitational pull.
2. Roots of plants exhibit geotropism.

Final Answer: Mimosa pudica shows nastic movement.