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heliotropism |
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heliotropism [‚hē·lē′ä·trə‚piz·əm] (biology) Growth or orientation movement of a sessile organism or part, such as a plant, in response to the stimulus of sunlight. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The finding of heliotropism in modern stromatolites not only sheds light on the behavior of living microorganisms but also helps to confirm an earlier geologic theory linking the tiny architectures of ancient stromatolites to the much larger dynamics of the ancient solar system. |
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