Vascular bundle with cambium is called

If there is more than one tunica layer in a stem apex,which among the following is most likely to happen?

$A$ cavity or a gland formed by the separation of cells is known as:

What is observed during the formation of vascular bundles in plants?

The primary function of a vessel in plants is:

$A$ vascular bundle in which a group of xylem and a group of phloem are on the same radius with xylem near the pith and phloem near the cortex and both are not separated by the cambium,is called: