Which of the following diagrams correctly dep | vedclass

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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?

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Fishing and Guano birds assist the cycling of

Select the correct matches.
$I$ Nitrosomonas - Nitrite to nitrate
$II$ Thiobacillus - Denitrification
$III$ Nostoc - Free-living nitrogen-fixer
$IV$ Azotobacter - Anaerobic nitrogen-fixer

The conversion of ammonia into nitrate by microorganisms is called:

The conversion of ammonia into nitrites and nitrates is called

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?

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