Question

choose the statement about nitrogen and nitrogen fixation that is false. when an animal dies, microorganisms convert the nitrogen in its proteins and muscles into a form that plants can eat. nitrogen in the atmosphere is not usable, so it needs to be “fixed” to be of benefit to plants and animals. nitrogen makes up about 22% of the atmosphere and is an important biological compound found in dna. the roots of certain plants contain microorganisms that absorb nitrogen from the atmosphere and pass it on to animals.

Explanation:

Nitrogen makes up about 78% of the atmosphere, not 22%. The other statements are correct about nitrogen - fixation and nitrogen's role in the ecosystem. For example, atmospheric nitrogen is inert and needs to be fixed, and when animals die, nitrogen in their bodies is recycled by microorganisms for plant use, and some plants have symbiotic relationships with nitrogen - fixing microorganisms.

Answer:

Nitrogen makes up about 22% of the atmosphere and is an important biological compound found in DNA.