Question

which of the following are the abiotic reservoirs of nitrogen?

• atmosphere and soil
• plants and animals
• microbes and soil
• plants and atmosphere

Explanation:

Abiotic reservoirs are non - living components that store a substance. Nitrogen makes up about 78% of the atmosphere, so the atmosphere is an abiotic reservoir. Soil also contains nitrogen in various forms (like nitrates, ammonium ions) and is non - living. Plants, animals, and microbes are biotic (living) components. So among the options, atmosphere and soil are abiotic reservoirs of nitrogen.

Answer:

A. Atmosphere and soil