Heart wood

Assertion (A) : Sap wood is vital to the plant but heart wood is not . Reason (R ) : When the heart wood of the tree is destroyed, no vital function of the plant is affected , when the sap wood is destroyed the plant will die, conduction of water is blocked.

Secondary Growth in Dicot Stems || Activity OF Cork Cambium|| Lenticels || Annual Rings || Tyloses || Hardest Lighest Woods Bark || Spring Wood || Autumn Wood || Sap Wood and Heart Wood || SOFt Wood and Hard Wood