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the tendency of plants to grow toward or away from light, influenced by the direction and intensity of light
- Sunflowers exhibit phototropism by turning their heads to face the sun throughout the day.
- The tomato seedlings displayed positive phototropism as they grew towards the nearby window.
- Plant biologists study phototropism to understand how plants perceive and respond to light stimuli.
- The leaves of indoor plants showed negative phototropism by curling away from direct sunlight.
- Farmers use knowledge of phototropism to optimize crop placement for maximum sunlight exposure.