The roots of plants are important to photosynthesis because they... A. remove glucose from the plant. B. remove oxygen from the plant. C. provide the water needed. D. provide the carbon dioxide needed.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.