Answer :
Answer:
Animals obtain usable nitrogen by eating plants and other animals.
Explanation:
Nitrogen is one of the components of air, it has the highest percentage by volume (78.09%) of all the gases that made up air.
Nitrogen is one of the important component that plants used to make protein. Plants can not use the atmospheric nitrogen in its raw form, so the nitrogen fixing bacteria that are found in the soil always help plants to convert atmospheric nitrogen to the forms that plants can use in their metabolism; thus, plants absorb nitrogen from the soil during their growth period.
Animals need nitrogen to synthesize proteins. Animals usually obtain the nitrogen they need by eating plant materials or by eating other animals, which have fed on plant materials.
The process by which the nitrogen fixing bacteria in the soil fix nitrogen is very important to life on earth, this is because without it plants and animals will not be able to get the nitrogen they need to form a very essential macro nutrient, which is protein. Proteins in animals perform diverse functions including serving as enzymes and transporters.