Explain two tropic movements with suitable examples.

Explanation

1. Phototropism : Response of plant to light cite example is called phototropism.
Ex : sunflower
2. Geotropism : Response of a plant to gravitational force
Ex : root growth of plant
3. Hydrotropism : Response of root to water availability in the soil.
Ex : Plants which are growing very close to rocks and walls.
4. Thigmotropism: Response to make contact or touch is called Thigmotropism.
5. Chemotropism : Response to chemical is called chemotropism (Stigma secretes sugary substances)