What are tropic movements? Name the types of tropic movements in plants.
The bending or movement of a part of plant in response to the external stimulus is called tropism or tropical movement. It is of following types :
- Phototropism: It is a response to light. It may be towards light (positive) or away from the light (negative).
- Geotropism: It is a response to gravity-. It may be towards stimulus (positive) and away from the stimulus (negative).
- Chemotropism: Response to chemicals. It may be positive or negative.
- Hydrotro pism: Response to water. It may be positive or negative.