Nitrogen is a critical element of the ecosyst | vedclass

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(A) Nitrogen is a critical element of the ecosystem because it is an essential component of biological molecules such as proteins, nucleic acids ($DNA

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Essential element

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(A) Nitrogen is a critical element of the ecosystem because it is an essential component of biological molecules such as proteins, nucleic acids ($DNA$ and $RNA$), and chlorophyll. Although it is abundant in the atmosphere ($78\%$), it is not directly available to most organisms in its gaseous form ($N_2$). It must be converted into usable forms (like ammonia or nitrates) through the process of nitrogen fixation, which is primarily carried out by specific microbes. Therefore, its role as an essential building block for life makes it critical.

Nitrogen is a critical element of the ecosystem because it is

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