Age of a tree can be estimated by

In dicot roots,which tissues die due to the activity of the cork cambium (phellogen)?

During the formation of interfascicular cambium,which cells lose the capacity to divide but mature to perform specific function?

Identify the incorrect statement regarding heartwood.

$A$ nail is driven into the trunk of a $30$ year old tree at a point $1$ meter above the soil level. The tree grows in height at the rate of $0.5$ meters a year. After three years,the nail will be

As secondary growth proceeds in a tree,the thickness of which of the following increases?