A protostele is the simplest type of stele, in which the xylem occupies the central core, surrounded by a narrow layer of phloem. This arrangement is common in most primitive vascular plants, such as lycophytes and some ferns. It provides basic structural support and efficient transport of water and nutrients.
Stele of stem which xylem is in the centre surrounded by a narrow band of phloem is called as ______?
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