Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Biology Botany
There is sufficient amount of nitrogen in the air, but the plants still do not take nitrogen directly, because
1
It is not directly beneficial for plants.
2
It does not act in water.
3
It reacts immediately with oxygen in the atmosphere
4
More than one of the above
5
None of the above