The chief function of a vessel in a plant body 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:

Ground tissue includes

The rind of $Citrus$ fruit possesses:

Laticiferous vessels are found in

Which one of the following is well-developed in hydrophytes?