Question

give some precise locations of some primary and secondary tissues

Answer 1

the oldest layer of phloem or primary phloem lies just inner to pericycle

the oldest layer of secondary phloem lies just inner to the primary xylem

the youngest layer of phloem or secondary phloem lies just outside the vascular cambium

the youngest layer of xylem or secondary xylem lies just inside the vascular cambium while the oldest layer of secondary xylem lies just outside the primary xylem

Answer 2

Meristems are classified by their location in the plant as apical (located at root and shoot tips), lateral (in the vascular and cork cambia), and intercalary (at internodes, or stem regions between the places at which leaves attach, and leaf bases, especially of certain monocotyledons—e.g., grasses).