FRANCIS CHEE / SCIENCE PHOTO LIBRARY FRANCIS CHEE / SCIENCE PHOTO LIBRARY
Transpiration is the loss of water from a plant's surface, generally from the leaves through pores called stomata. Here a plastic bag has been wrapped tightly around the leaves of a shrub (Viburnum sp.). This is to show the water lost from the leaves as it condenses back into water droplets and collects on the inside surface of the bag.
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