52. Ecosystems

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?

In the context of biogeochemical cycles, how does increasing plant biomass most directly affect atmospheric CO2 levels?

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?

In the carbon cycle, how does carbon most directly enter the biotic (living) part of an ecosystem?

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?

Why is cycling carbon important in ecosystems?