DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Leaf surface stomata from Arabidopsis sp, scanning electron micrograph (SEM). Stomata (plural of stoma) are tiny openings in the epidermis of a plant that are surrounded by pairs of crescent-shaped cells, called guard cells, that facilitate gas exchange. Arabidopsis is indigenous to Europe and is a N.W. American weed used in many botanical genetic studies due to its short life cycle. Arabidopsis thaliana has gained interest from the scientific community as a model organism for research on numerous aspects of plant biology. Magnification: x240 when shortest axis printed at 25 millimetres.
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