Humans and other animals require nitrogen; however, they cannot obtain it from the air or soil. What must animals consume in order to obtain the nitrogen they need?

Question

Quizplus · Accepted Answer

Animals and humans obtain the nitrogen they require by consuming protein. Proteins are made of carbon, hydrogen, oxygen, and nitrogen, which are arranged as chains (polymers) of amino acids.

Humans and Other Animals Require Nitrogen; However, They Cannot Obtain