Friday, May 18, 2012

T is for Tropism!

There are three major kinds of tropisms: phototropism, gravitropism, and thigmotropism. A tropism is a reaction to a stimuli in plants. More specifically, phototropism is the reaction to light, gravitropism is the reaction to gravity, and thigmotropism is the reaction to touch.



This plant is displaying tropism because it is moving towards where the light will reach. It's base is much farther down in the forest where very little light reaches. The leaves of the plant reach toward the sun, exemplifying phototropism.

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