Question

Define phototropism and give one example.

Answer 1

• Phototropism is defined as the orientation of the plant or other photosynthesizing organisms in response to light.
• Phototropism is a phenomenon by which a plant can maximize its exposure to sunlight because plants need sunlight to make food
• Phototropism is of two types-

1. Positive phototropism- Response of plant towards the light source. Example include sunflower.
2. Negative phototropism- Plant grows opposite to the light source. Example include Arabidopsis inflorescence.