The carbon and nitrogen cycles are related to one another because:
A)microorganisms have important roles in the cycling of each.
B)both are liberated into the environment when organisms decompose.
C)both are required to make the primary biological molecules (carbohydrates, fats, proteins, and sugars).
D)All of these choices are correct.

Question

Quizplus · Accepted Answer

Microorganisms play important roles in both the carbon and nitrogen cycles by breaking down organic matter to release carbon and nitrogen back into the environment. Both carbon and nitrogen are required to make the primary biological molecules, which are essential building blocks for all living organisms. Additionally, both carbon and nitrogen are liberated into the environment when organisms decompose, providing important nutrients for plant growth and ultimately supporting the entire food chain. Therefore, all of these choices are correct.

The Carbon and Nitrogen Cycles Are Related to One Another