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Krisk · Answer 1 · 2017-09-28T05:17:52+0000

Phototropism is a positive tropism involving sunlight. Tropism is the movement of a plant toward or away from a stimulus. Tropism can be negative or positive. Negative denotes moving away from and positive denotes moving towards. Phototropism occurs when plants bend towards sunlight.

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positive; sunlight

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