Question

The nitrogen utilized by most plants is derived from

A. soil.
B. the atmosphere.
C. nitrogen gas.
D. decayed organic matter

Answer 1

I think the correct answer from the choices listed above is option A. The nitrogen utilized by most plants is derived from the soil. Nitrogen is a component of chlorophyll and therefore essential for photosynthesis. Plants use nitrogen by absorbing either nitrate or ammonium ions through the roots.