Question

Consider the following diagram and choose the correct option that would replace a, b and c respectively?

• A. Ammonia $\to$ Nitrates $\to$ Nucleic acids
• B. Ammonia $\to$ Nitrates $\to$ Nitrogen in the atmosphere
• C. Nitrates $\to$ Ammonia $\to$ Nitrogen in the atmosphere
• D. Nitrogen in the atmosphere $\to$Ammonia $\to$ Nitrates

Answer 1

The correct option is D

Nitrogen in the atmosphere $\to$Ammonia $\to$ Nitrates

After nitrogen fixation, nitrogen in the atmosphere is usable by the plants and animals. Ammonia is released when these plants undergo ammonification.

Nitrates are converted into nitrogen by denitrification.

Nitrogen in the atmosphere $\to$ Ammonia $\to$ Nitrates