Teaching BPSC बिहार मध्य विद्यालय (6 to 8) 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