The youngest layer of secondary xylem in the wood of a dicot plant is located:

The cork cambium, cork and secondary cortex are collectively called:

In the dicot root,the vascular cambium originates from:

Explain the difference between heartwood and sapwood.

In a typical dicot stem,the cork cambium $(phellogen)$ develops from:

Select the correct statement$(s)$:
$(1)$ Lenticels are absent in woody climbers.
$(2)$ Lenticels are found in most woody trees.
$(3)$ Spring wood is lighter in color and has a lower density.
$(4)$ Sapwood is also known as duramen (heartwood).