Why is nitrogen needed by plants and animals?

Nitrogen needed by plants and animals:

1. Nitrogen is needed both by Plants and Animals because it is the major constituent of proteins, vitamins, hormones, etc.
2. Nitrogen is a crucially important component of life. It is an abundant element present in the atmosphere.
3. Every living organism including plants and animals requires nitrogen for its growth and development.
4. Along with other minerals, nitrogen is known as macro minerals as they are found in large amounts in plant tissues.