Word Count : 502

---

The nitrogen cycle is a fundamental biogeochemical cycle that describes the movement of nitrogen through the atmosphere, lithosphere, hydrosphere, and biosphere. Nitrogen is an essential element for all living organisms as it forms a key component of amino acids, proteins, nucleic acids, and other cellular constituents. Despite its abundance in the atmosphere, where molecular nitrogen (N₂) constitutes about 78% of air, most organisms cannot directly utilize atmospheric nitrogen. Therefore, nitrogen must undergo specific transformations to become biologically available, linking its reservoirs through complex ecological processes. The primary reservoirs of nitrogen include the atmosphere, soil, water bodies, and living organisms. The atmosphere serves as the largest reservoir, primarily containing inert N₂ gas. Soil and water bodies act as secondary reservoirs where nitrogen exists in different chemical ________ ______ __________ ________ __________ ___ _______ _______ _________ _____ ____ _____.
_______ __________ ____ ________ ____ ____ ______.
_____ ____ ______ _______ ________ __________ __________ _______ _______ ___ _________ ___.
__________ _____ _______ _____ _______ _____ _____ ____ ________ _____ ___.
___ ___ ________ __________ ________ ___ ________ __________ ______ ______.
______ ________ _____ _________ ____ ____ ______ _______ ______ _________ ____.
__________ _____ _______ _________ ________ ______ ___ _____ _____.
___ ___ _______ _____ __________.
_______ ___ ______ _______ ___.
__________ _____ ____ _______ _______ ___.
___ _______ ____ _________ _____ ________ ______ _______.
_________ ______ _________ _____ ________.
______ _________ ______ _____ ______ _____ _________ ____ _____ _______ ___.
__________ _____ ____ _______ ____ __________ ___ ________ ____ ______ ________.
___ _________ __________ __________ ___.
__________ ___ _____ ________ _________ _______ __________ ______.
_______ __________ ______ _____ ________ ________.
_________ _____ _____ _________ ____ ____ _____.
______ ___ __________ __________ ____ _____ _____ ______ ______ __________.
_____ ___ ______ ___ __________ _____ ____ __________ _________.
______ ___ ___ __________ _____ ___ _________ _______ ________.
______ ________ ____ ___ ____.
________ _________ ____ ______ ___ ____ ____ _________.
________ __________ _____ ________ __________ ______ _________ _______ ________ _____ ________ ______.
_______ ____ ___ _____ _________.
____ ____ _____ ____ ________.
__________ ______ ___ ____ _________ _________ ______ ______ ___ __________ _______ ________.
________ __________ _________ _________ _________ _____.
____ ____ ____ ___ ____ _________ _________ ____ _________ _________ __________.
_____ ______ ________ ______ ____ __________ __________.
______ ______ ________ _______ _____ _______ ____ _____ _________ _______.
_________ _________ __________ ___ ________ _____ _______ ____ _________ ____.
___ _____ _________ _______ ________ ________ ___ ____.
______ ____ _______ __________ _______ ________ _____ ____ ______.
_____ ____ _____ _____ ___ __________ ___.
_________ ________ _______ _____ ________ ________ ___ _____ _______ _____ ___ ___.
______ ___ ___ ____ ______ ________ ________ ___.
____ _______ __________ _______ _________ ______ _______ _________ ______ _________.
_______ ___ ___ _________ _____ ______.
___ ______ _______ ________ _________ __________ _______ _________ _________ __________ ____ ________.
________ ___ ______ ____ ______ ________ ____ ___ ______ _______ ________ ______.
__________ _______ _______ ___ _________ _____ _________ ____ _______ ________ _______ ________.
__________ ____ _____ _________ __________.
_________ ____ ______ ________ ________ ____ _________ __________.
Get Full Answer on WhatsApp