Atmospheric nitrogen can be fixed by nitrogen-fixing bacteria.Arrange the following forms of nitrogen from the atmospheric N stage to the final form that enters the roots.
1)Ammonia
2)Nitrogen gas
3)Ammonium ion
4)Nitrite
5)Nitrate

Question

Quizplus · Accepted Answer

The correct sequence starts with nitrogen gas (N2) being fixed into ammonia (NH3) by nitrogen-fixing bacteria. Ammonia can then be converted into the ammonium ion (NH4+), which is further processed into nitrite (NO2-) and finally into nitrate (NO3-), the form most readily absorbed by plant roots.

Atmospheric Nitrogen Can Be Fixed by Nitrogen-Fixing Bacteria