Tuesday, August 14, 2012

How do plants know which way is up or down?

If plants start from seed underground, then how do they know which way is up or down?  Do they sense gravity?  What would happen in space?  This great article from NPR discusses this along with why there truly are rocks in your head.

Time-lapse of a seed sending leaves up and roots down.

Posted via email from Verdant Design

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