What is tropism
Biology
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Answer
Tropism is a directional growth response of a plant to an external stimulus. The plant grows towards or away from the stimulus.
Examples include:
- Phototropism: Growth in response to light. Shoots typically grow towards light (positive phototropism).
- Gravitropism (or geotropism): Growth in response to gravity. Roots grow downwards (positive gravitropism), and shoots grow upwards (negative gravitropism).
- Thigmotropism: Growth in response to touch, seen in climbing plants.
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