The response of plants to external stimuli in a non-directional manner is known as

The response of plants to external stimuli in a non-directional manner is known as nastic movement. This is a type of movement that is not dependent on the direction of the stimulus, but rather occurs uniformly in all directions. Examples of nastic movements in plants include the opening and closing of flowers in response to changes in light and temperature, and the folding of leaves in response to touch or vibration. Tactic movement, phototropism, and geotropism are all examples of directional movements that are influenced by the direction of the stimulus.