Question

How is usable nitrogen obtained by anumals?

Answer 1

Answer:

The animals get nitrogen from the plants. The nitrogen that is present in the environment is not used by the plants in the gaseous form. The bacteria that is found in the soil fixes nitrogen and makes it usable for the plants.

The plants uptake nitrpogen in the form of nitrates. The animals that feed on these plants uptake nitriogen from it.

The animals excrete the waste materials and release nitrogen in the environment.

Answer 2

Animals obtain nitrogen by eating plants which has absorbed nitrogen from the soil.