DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Macrophotograph of the roots of a small Lawson's cypress tree, Chamaecyparis lawsoniana, showing the different stages of development of the root tissues. The tip of each root, where cell division is occurring, is white. Just above this is a greyish-white region where cell enlargement occurs. The mature, brown tissue above this has ceased to elongate and the cells are differentiating into different tissue types.
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