Question

Fill in the following blanks with suitable words.

(g) As a result of the nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less

Answer 1

• Nitrogen from the atmosphere is fixed by microorganisms and lightning. The usable forms of nitrogen are used by plants.
• Plants are eaten by animals. When plants and animals die, the decomposers decompose the dead matter and release simple nutrients like nitrogenous nutrients back into the soil.
• Certain microbes again convert the nitrogenous nutrients present in the soil to atmospheric nitrogen. This cycle goes on and on.
• As a result of nitrogen cycle in nature, the pertentage of nitrogen gas in the atmosphere (or air) remains constant.