Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Biology Plant Physiology Plant Growth and Development
Premature fall of leaves, flowers and fruits in apple trees can be checked by spraying plants with:
1
Indole acetic acid
2
Ethylene
3
Benzyl amino purine
4
More than one of the above
5
None of the above