A growth response to light<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
A growth response to light<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
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Educational Ministries, Inc. 1998</ref>. Plants are phototropic because they grow by using [[Photosynthesis|photosynthesis]] to synthesize glucose from sunlight, [[Carbon Dioxide|CO<sub>2</sub>]], and [[water]].
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Educational Ministries, Inc. 1998</ref>. Plants are phototropic because they grow by using [[Photosynthesis|photosynthesis]] to synthesize glucose from sunlight, [[Carbon Dioxide|CO<sup>2</sup>]], and [[water]].