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प्रश्न
Why is the closing of a dandelion flower at dusk (when it gets dark) not a tropism?
उत्तर
The closing of a dandelion flower at dusk is not a tropism because it is a non-directional movement in response to the intensity of light. On the contrary, tropic movement is the movement of plant parts towards the light. It does not depend upon the intensity of light.
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संबंधित प्रश्न
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