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-mem-, root. -mem-comes from Latin, where it has the meaning mind; memory.'' This meaning is found in such words as: commemorate, immemorial, memento, memo, memoir, memorabilia, memorandum, memorial, memorize, memory, remember, remembrance. '
The root apical meristem is a region of growth tissue near the tip of each root. The meristematic cells in this region grow in two directions, both backward toward the above-ground shoot and forward toward the tip of the root.