Write the nutrition method of nitrifying bacteria.

(N/A) $\Rightarrow$ Nitrifying bacteria are chemoautotrophs.
$\Rightarrow$ They obtain energy by oxidizing inorganic substances like ammonia $(NH_3)$ or nitrite $(NO_2^-)$ into nitrate $(NO_3^-)$.
$\Rightarrow$ This energy is used to fix carbon dioxide $(CO_2)$ into organic compounds.
$\Rightarrow$ The nitrate formed is absorbed by plants and transported to the leaves.
$\Rightarrow$ In the leaves,it is reduced to form ammonia,which is then incorporated into amino acids.
$\Rightarrow$ The pathway is: $\text{Nitrate} \rightarrow \text{Leaves} \xrightarrow{\text{Reduction}} \text{Ammonia} \rightarrow \text{Amino acid}$.