The stele in a dicot stem is known as:

$A$ common difference between the stem and the root is that the xylem in the stem is ...... .

In which of the following are numerous vascular bundles and the absence of cambium observed?

Match the following:

Column-$I$	Column-$II$
$(1)$ Monocot stem	$(a)$ Bulliform cells
$(2)$ Monocot root	$(b)$ Casparian strips
$(3)$ Monocot leaf	$(c)$ Polyarch xylem bundles
	$(d)$ Vascular bundles conjoint and closed

Vascular bundles in the stem of $Cucurbita$ or $Lagenaria$ are

Select the correct option$(s)$ from the following statements:
$(i)$ Fibers are thin-walled,elongated,and pointed cells.
$(ii)$ Water-containing cavities (lysigenous cavities) are found in the vascular bundles of monocot stems.