Which type of plant movement is caused by growth in response to a stimulus?
Directional growth
Plants respond to external stimuli such as light, gravity, water or touch through slow movements that are usually caused by unequal growth on different sides of the plant part.
These growth-based movements occur in a specific direction, either towards or away from the stimulus, and are broadly called tropic or directional growth movements.
Examples include phototropism, where a shoot bends towards light, and geotropism, where roots grow towards gravity.
Hence, directional growth is the plant movement caused by growth in response to a stimulus.
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