OBJECTIVE FORESTRY

Detailed explanation-1: -Answer and Explanation: Heartwood is comprised of dead tissue while sapwood is comprised of living tissue. Heartwood is darker because the dead cells accumulate secondary metabolites. These include compounds like resins, phenols and terpenes and they darken this part of a tree and make it harder and supportive.

Detailed explanation-2: -The sapwood is the wood closest to the bark of a tree. It is often a lighter tone than the heartwood, which is the wood closest to the center of the tree. On a living tree, the sapwood carries the water and nutrients up from the ground. The heartwood is considered somewhat dead but provides strength and support.

Detailed explanation-3: -Heartwood are also called duramen. It is dead, central wood of trees. It’s cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic.