How Do Animals Get Nitrogen. When animals eat the plants, they acquire usable nitrogen compounds. The main source of nitrogen for animals are the plants.
Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. Animal (herbivore) feed on plants absorbs nitrogen in the form of protein. Bacteria that convert nitrogen into ammonia that is used by plants.
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When animals eat the plants, they acquire usable nitrogen compounds. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. For herbivore animals, they directly get the nitrogen content by eating green plants and shrubs. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water.