Question

WILL UPVOTE AND NEED HELP ASAP!

Nitrogen is naturally abundant in the atmosphere. Why are nitrogen fertilizers added to soil, despite the dangers they produce when they enter aquatic ecosystems?

A. Most organisms are not able to utilize N2.

B. Most organisms are not able to utilize ammonium.

C. Most organisms are not able to utilize nitrate.

D.Most organisms are not able to utilize NO3.

Answer 1

A. Most organisms are not able to utilize N2.

Answer 2

Answer: A. Most organisms are not able to utilize N2.

Step-by-step explanation:

Nitrogen cycle is one of the important biogeochemical cycle.

Nitrogen is an ingredient for synthesis of aminoacids which are necessary for production of plant proteins. But plants are incapable of absorbing the atmospheric nitrogen directly. Certain soil bacteria convert the atmospheric nitrogen into forms like nitrites, nitrates and ammonia. This process is called as nitrogen fixation. These forms are absorbed by plants and the bacteria receives nourishment from roots of the plants.