52. Ecosystems

Which of the following processes is primarily responsible for returning nitrogen from dead organisms back into the atmosphere in the nitrogen cycle?

Which of the following best describes the primary effect of biogeochemical cycles on Earth's ecosystems?

How do decomposers contribute to the carbon cycle?

In the phosphorus cycle, where does the cycle primarily begin?

Which nutrient cycle does not have an atmospheric component?

Which two spheres of Earth are primarily involved in the phosphorus cycle?

What role do decomposers play in the carbon cycle?

Which of the following statements correctly compares the nitrogen, carbon, and oxygen cycles?

Which of the following statements is correct about biogeochemical cycling?

Which of the following are ways that carbon can move from the atmosphere to the hydrosphere?

Which biological process by decomposers releases carbon from organic forms back into the atmosphere?

Which of the following processes is specifically part of the nitrogen cycle?

Which biogeochemical cycle does not involve a stage where the chemical enters the atmosphere?

How are decomposers critical to the carbon cycle?

Which of the following is a compound that is cycled through an ecosystem?