Choose two statements that describe why the nitrogen cycle is important to ecosystem stability. A. Nitrogen is a part of protein and DNA in living things. B. Plants take in nitrogen from the air for cellular respiration. C. Microorganisms feed on nitrogen and use it to break down waste. D. Animals eat nitrogen out of the soil and use it to grow and reproduce. E. Plants require nitrogen to be healthy and to support other organisms.

Answer 1

The two statements that describe why the nitrogen cycle is important to ecosystem stability are:

A. Nitrogen is a part of protein and DNA in living things.
E. Plants require nitrogen to be healthy and to support other organisms.

These statements highlight the fundamental role of nitrogen in the biological processes of all living organisms and its importance for plant health, which in turn supports the entire ecosystem.