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As a tree grows older, which increases r...

As a tree grows older, which increases rapidly in thickness

A

Its heart wood

B

Its cortex

C

Its sap wood

D

Its phloem

Text Solution

Verified by Experts

The correct Answer is:
A
In old trees, the greater part of secondary xylem is dark brown due to deposition of many organize material which results in rapidly increase in thickness.
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