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Biology Lesson Idea: Plants, Tropisms and Hormones | Twig
3:02
YouTubeTwig Science Reporter
Biology Lesson Idea: Plants, Tropisms and Hormones | Twig
Why do plants grow towards light? And how do roots know in what direction to grow? Watch this video to find out how growth responses direct how plants grow. Learn terms like auxins, phototropism, geotropism and hydrotropism—and find out the difference between positive and negative tropisms. This video is designed to be used alongside other ...
497.1K viewsOct 29, 2012
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