Explain how auxin helps plants exhibit positive phototropism
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The higher concentration of auxinon the shady side causes the plantcells on that side to grow more so it bends toward the light. This is due to a phenomenon calledphototropism. Phototropism is the growth of an organism which responds to a light stimulus.
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Plants can respond to gravity, water, touch, and light in their environment.Plant parts can grow with or against gravity. ... Roots of a plant grow downward and exhibit positivegravitropism. Stems, on the other hand, exhibit negative gravitropism since they grow upwards and against the force of gravity
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