The growth zone that gives rise to outer layers of bark on both root and shoots is the

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The cork cambium, also known as the phellogen, is responsible for producing the outer layers of bark in both roots and shoots. The vascular cambium gives rise to new xylem and phloem and is located between the bark and wood, while the lateral meristem and apical meristem are involved in primary growth of shoots and roots, respectively.

The Growth Zone That Gives Rise to Outer Layers of Bark