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  • 10-04-2017
  • Biology
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what is the structure of a stem

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  • 10-04-2017
Vascular tissue composed of xylem (red) and phloem tissue (green, between thexylem and cortex) surrounds the pith. Collenchyma cells are elongated cells with unevenly-thickened walls . They provide structural support, mainly to the stem and leaves.
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