goldfish5961 goldfish5961 07-03-2018 Mathematics contestada I need help checking my work. MEDALS!!! will be awarded. I chose C. Kidneys process nitrogenous wastes by A) seperating water from nitrogenous wastes by passive diffusion. B) using cells to actively pump water across a membrane. C) storing the wastes as uric acid until they can be eliminated. D) pumping ions across membranes to separate water from waste products.