Yellow paloverde tree (Parkinsonia microphylla). Photosynthesis is carried out in the bark of this tree, rather than in the leaves. This adaptation en


Yellow paloverde tree (Parkinsonia microphylla). Photosynthesis is carried out in the bark of this tree, rather than in the leaves. This adaptation enables it to survive drought conditions by allowing it to shed its leaves in hot periods. ÂPhotographed in the Organ Pipe Cactus National Monument, Arizona, USA.


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Photo credit: © BOB GIBBONS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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