Define the following terms:
$(i)$ Conjoint vascular bundles
$(ii)$ Secondary growth

(N/A) $(i)$ $A$ vascular bundle in which xylem and phloem are situated at the same radius is called a conjoint vascular bundle.
$(ii)$ The increase in the girth or diameter of the plant body due to the formation of secondary tissues (secondary xylem and secondary phloem) by the activity of lateral meristems (vascular cambium and cork cambium) is known as secondary growth.