Secondary xylem and phloem in dicot stem are produced by
A. Phellogen
B. Vascular cambium
C. Apical meristems
D. Axillary meristems
Answer:B
Secondary xylem and phloem in dicot stem are produced by
A. Phellogen B. Vascular cambium C. Apical meristems D. Axillary meristems