Palisade cells in a holly leaf
Light micrograph of a transverse section through a holly leaf, Ilex sp. . Below the epidermis (top layer of cells), are two layers of column-like cells known as palisade cells. These contain large numbers of chloroplasts and are the principal sites of photosynthesis. Magnification: x240 at 35mm size.
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Palisade cells in a holly leaf. Photograph. Encyclopædia Britannica ImageQuest. Web. 18 Apr 2016.
http://quest.eb.com/search/132_1333150/1/132_1333150/cite
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