Question
What are the differences between tropic and nastic movements in plants?
Answer
| Tropic Movements | Nastic Movements |
|---|---|
| These are directional movements that occur in response to a stimulus and are dependent on the direction of the stimulus. | These are non-directional movements that occur in response to a stimulus and their direction is independent of the direction of the stimulus. |
| The response is usually slow and occurs through the growth or elongation of cells. | The response is usually rapid and does not involve the growth or elongation of cells. |
| The movement is irreversible once the stimulus is removed. | The movement is reversible and can occur repeatedly in response to the same stimulus. |
| Examples include phototropism, geotropism, and thigmotropism. | Examples include seismonasty, thermonasty, photonasty, and nyctinasty. |
