1.

If you cut the old trunk of a tree transversely, you will observe that the outer region of secondary wood is lighter in colour. This region of wood is known asA. Autumn woodB. Sap woodC. Heart woodD. Spring wood

Answer» Correct Answer - B
The outer young and functional part of xylem is called sap wood. The functions of conduction of water and dissolved mineral from roots is now performed by outer younger rings of secondary xylem which constitute the sapwood.


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