Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Biology Botany
Secondary xylem and phloem in dicot stem are produced by
1
Apical meristems
2
Vascular cambium
3
Axillary meristems
4
More than one of the above
5
None of the above