Question

Which statement about decomposition is most correct?

• A. Bacteria and fungi carry out the photosynthesis needed for breaking down proteins
• B. Bacteria and fungi produce the oxygen needed for photosynthesis
• C. Bacteria put oxygen back into the atmosphere
• D. Bacteria and fungi use oxygen to break down organic nitrogen to nitrates that plants can use

Answer 1

The correct option is D Bacteria and fungi use oxygen to break down organic nitrogen to nitrates that plants can use

1. Areobic organisms such as some bacteria and fungi use oxygen to decompose the organic waste where they breakdown organic nitrogen into nitrates.
2. The plants are not able to uptake nitrogen directly from the atmosphere so after the organic nitrogen is decomposed by thses organisms it can be absorbed by the plant. And nitrogen re-enters the food chain.