Question

A timber merchant told his customer that log of wood, which he was purchasing comes from a $20$ years old tree, he told so by inspecting the

• A. Diameter of log
• B. Thickness of the heart wood
• C. Number of cork layers
• D. Growth rings

Answer 1

The correct option is D Growth rings

Growth rings, also referred to as annual rings, can be seen in a horizontal cross section cut through the trunk of a tree. Growth rings are the result of new growth in the vascular cambium, a layer of cells near the bark that is classified as a lateral meristem. This growth in diameter is known as secondary growth.

Visible rings result from the change in growth speed through the seasons of the year.

Dendrochronology or tree ring dating, is the scientific method of dating based on the analysis of patterns of tree rings, also known as growth rings. Dendrochronology can date the time at which tree rings were formed, in many types of wood, to the exact calendar year. Thus, option D is correct.