Question

Directional movement of plants in response to external stimuli is called ______.

Options

• Nastic

• Growth

• Tropism

• Thigmonasty

Answer 1

Directional movement of plants in response to external stimuli is called Tropism.

Explanation:

Tropic movements (or tropisms) are growth movements where the direction of the plant's response is directly determined by the direction of the external stimulus, such as light or gravity.