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(A) The nitrogen cycle is a biogeochemical process by which nitrogen is converted into various chemical forms as it circulates among the atmosphere,te

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(A) The nitrogen cycle is a biogeochemical process by which nitrogen is converted into various chemical forms as it circulates among the atmosphere,terrestrial,and marine ecosystems.$1$. Nitrogen fixation converts atmospheric nitrogen $(N_{2})$ into ammonia $(NH_{3})$.$2$. Nitrification is the process where ammonia is converted into nitrites $(NO_{2}^{-})$ and then into nitrates $(NO_{3}^{-})$ by nitrifying bacteria.$3$. Assimilation involves plants taking up these nitrates to form organic nitrogen compounds.$4$. Ammonification is the process where organic nitrogen from dead organisms is converted back into ammonia by decomposers.$5$. Denitrification is the process where nitrates are reduced back into atmospheric nitrogen $(N_{2})$ by denitrifying bacteria.Looking at the options,option $A$ correctly represents the sequence: Atmospheric Nitrogen $\rightarrow$ Ammonia (via fixation) $\rightarrow$ Nitrites $\rightarrow$ Nitrates $\rightarrow$ Atmospheric Nitrogen (via denitrification).

Which of the following diagrams correctly depicts the $N_{2}$-cycle?

Similar Questions

Nitrifying bacteria perform which of the following processes?

Nitrite is converted into nitrate by ........ bacteria.

Which bacteria is responsible for the reduction of nitrates into nitrogen in soil?

Reaction carried out by $N_{2}$ metabolising microbes include:
$I.$ $2 NH_{3} + 3 O_{2} \rightarrow 2 NO_{2}^{-} + 2 H^{+} + 2 H_{2} O$
$II.$ $2 NO_{2}^{-} + O_{2} \rightarrow 2 NO_{3}^{-}$
Which of the following statements about these equations is not true?

Decomposition of organic nitrogen of dead plants and animals into ammonia is called.

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