STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Root tip. Coloured scanning electron micrograph (SEM) of the root of a young oriental poppy (Papaver orientale) seedling. The numerous root hairs (white) increase the surface area of the root to maximise uptake of water and nutrients. At the very tip of the root is a hairless root cap which protects the root. Just above this is the apical meristem, an area of rapidly dividing cells where most growth takes place. Magnification: x120 when printed at 10 centimetres wide.
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