Why and how the sunflower can follow the movement of the sun?

Subject: Why and how the sunflower can follow the movement of the sun?

Date: Mon Jan 8 16:03:36 2001
Posted by Zongyan
Grade level: teacher/prof School: Drexel University
City: Philadelphia State/Province: PA Country: U.S.A.
Area of science: Botany
ID: 978987816.Bt

Message:


My research field is about mechanics. Somebody told me that the 
sunflower's movement is caused by the different growth rates of cells, 
which is affected by the sunlight. But it seems to be impossible from the 
mechanics opinion, so I want to to know the real principle and the details 
about the sunflower's movement. Thanks a lot!

Re: Why and how the sunflower can follow the movement of the sun?

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