The intrafascicular cambium and interfascicular cambium are .......

The best method to determine the age of a tree is:

This wood is light in color,has low density,and consists of a large number of xylem elements with wide vessels.

The increase in girth of a dicot stem is due to the activity of:

$A$. Heartwood is durable,dark,and central in position.
$B$. Tyloses are balloon-like structures of xylem parenchyma in vessel lumen.
$C$. Late wood is formed during spring season.

The vascular cambium cuts off more cells towards the .........