Question

Identify the components A, B and C from the given image of nitrogen cycle.

Answer 1

Correct option is D.

A- Nitrogen-fixing bacteria

B- Nitrifying bacteria

C- Denitrifying bacteria

A- Nitrogen-fixing bacteria.

In the environment, the atmospheric nitrogen cannot be directly taken up by the plants and hence they are first converted into ammonia by nitrogen-fixing bacteria.

B- Nitrifying bacteria

The ammonia in the soil will get converted into ammonium ions. For it to be utilized by the plants, they should be converted into nitrates. This is done by the nitrifying bacteria, which is assimilated by the plants.

C- Denitrifying bacteria

After the plants use the nitrates, the remaining nitrates and nitrates from the plant body are converted back into atmospheric nitrogen with the help of denitrifying bacteria. This is crucial in maintaining the balance of nitrogen in the atmosphere.

So, the correct answer is option D.