When an old tree grows,which part increases i | vedclass

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(B) In woody dicot stems,secondary growth occurs due to the activity of the vascular cambium. As the tree ages,the inner layers of secondary xylem bec

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Sapwood

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(B) In woody dicot stems,secondary growth occurs due to the activity of the vascular cambium. As the tree ages,the inner layers of secondary xylem become non-functional and are filled with tannins,resins,and oils,forming the heartwood. The outer layers of secondary xylem,which are lighter in color and actively involved in the conduction of water and minerals,are known as sapwood. During secondary growth,the vascular cambium produces more secondary xylem towards the inner side than secondary phloem towards the outer side. Consequently,the sapwood layer continues to accumulate and increase in thickness as the tree grows,making it the part that increases in thickness most rapidly in an old tree.

When an old tree grows,which part increases in thickness most rapidly?

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