Secondary xylem and phloem in dicot stem are produced by
Option 1 : Apical meristems
Option 2 : Phellogen
Option 3 : Axillary meristem
Option 4 : Vascular cambium
The correct answer is option 4
Secondary xylem and phloem in dicot stem are produced by
Option 1 : Apical meristems
Option 2 : Phellogen
Option 3 : Axillary meristem
Option 4 : Vascular cambium
The correct answer is option 4
