Question

How does phototropism occur in plants th?

Answer 1

Answer:

Phototropism is a directional growth which occurs in response to unidirectional exposure to light. Due to the presence of more auxin, the part of the plant stem in the dark grows faster, causing it to bend towards the source of light.

Answer 2

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The directional movement of a plant in response to light is called phototropism. ...

(ii) When sunlight fells on only one side of the plant, the auxin diffuses towards the shady side of shoot. The concentration of auxin stimulates the cells to grow longer. Therefore, the stem appears to bend towards the source of light.