Tropism

Tropism

This tree is exhibiting tropism. More specifically, the tree is exhibiting phototropism. Phototropism is the growth of a plant in response to light. Light is very important for a plant because it drives photosynthesis. The end of the shoot (shoot tip) has a special protein that detects light. Therefore, the tree grew towards the window.

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by | August 17, 2012 · 6:04 pm

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