Secondary xylem and phloem in dicot stem are produced by
Phellogen
Vascular cambium
Apical meristems
Axillary meristems
Vascular cambium is partially secondary. It forms secondary xylem towards its inside and secondary phloem towards outsides. 4-10 times more secondary xylem is produced than secondary phloem.
Join thousands of students and practice with AI-generated mock tests.