Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Biology Botany
The growth of pollen tubes towards ovules within stylar tissue is due to
1
chemotropism
2
geotropism
3
hydrotropism
4
More than one of the above
5
None of the above