AP Biology

Answer: E, The process that is not a part of the water cycle is respiration. Respiration is part of the carbon cycle.

Key Takeaway: A biogeochemical cycle is the process by which nutrients and molecules move between the biotic (biosphere) and abiotic (atmosphere, hydrosphere, lithosphere) compartments of the planet. Biogeochemical cycles exist for water, carbon, nitrogen, oxygen, sulfur, and water, among others. These processes serve to recycle important substances so that there is always a constant supply available.