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.
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And on this point the researchers were on shaky ground, because no modern examples of heliotropism in stromatolites had ever been reported.
Awramik says that most recently he's also found evidence for heliotropism in millimeter-sized stromatolite tufts in the Caribbean.
Heliotropism occurs when the influence of these other factors is suppressed in some way.