Question

Why do animals and plants need nitrogen

Answer 1

Plants and Animals need Nirogen and its Sufficent

Step-by-step explanation:

Plants need Nitrogen especially Crops because they give protein with the help of nitrogen by the help of Rhizobium Bacteria.

With This Protein, Animals ( Herbivores) eat this for energy which contains nitrogen

Answer 2

They need Nitrogen to make Amino acid, DNA but the nitrogen in the atmosphere can't be used directly. Some nitrogen fixing bacteria fix it then it is able to use for plants and animals.

hope it helps!