Which of the Following Statements Is Correct About Biogeochemical Cycling

question 60

Multiple Choice

Which of the following statements is correct about biogeochemical cycling?

• A) Phosphorus is the limiting nutrient that most widely affects biomass production.
• B) The phosphorus cycle involves the weathering of rocks.
• C) The carbon cycle has maintained a constant atmospheric concentration of carbon dioxide for the past million years.
• D) The nitrogen cycle involves movement of diatomic nitrogen between the biotic and abiotic components of the ecosystem.