Question

about 80% of the air consists of nitrogen. certain types of bacteria present in soil convert this nitrogen into nitrogen compounds, which can be used by plants. plants absorb these compounds through their roots and use them to grow. when living organisms consume plants, the nitrogen products enter their bodies. based on this description, arrange the subsystems in the order that nitrogen has moved through them. - biosphere - geosphere - atmosphere

Explanation:

Step1: Identify starting subsystem

Nitrogen starts in the atmosphere (air has ~80% nitrogen).

Step2: Next subsystem

Bacteria in soil (geosphere) convert nitrogen to compounds.

Step3: Final subsystem

Plants (biosphere) absorb compounds, then organisms consume plants (biosphere). So order: atmosphere → geosphere → biosphere.

Answer:

1. atmosphere
2. geosphere
3. biosphere