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Gas exchange in plants occurs through these pores which open and close by the action of two "guard cells".
Einstein once said: "The secret to creativity is knowing how to hide your sources." As long as I can live oblivious to the stealing of my content or ideas, I'm happy. That said, try not to do it. Powered, as always, by the wonderful Zenphoto. Copyright 2004-08 Stéphane Angoulvant.