Here are the answers: 1. The process represented by the arrows is ultrafiltration. 2. One substance that remains at part B (Bowman's capsule) is proteins (or blood cells). 3. Part C is the proximal convoluted tubule. In a camel*, the proximal convoluted tubule is highly efficient at reabsorbing water, salts, and nutrients from the filtrate. This efficiency is crucial for conserving water in its desert environment, reducing the volume of filtrate before it reaches the loop of Henle. In a hippo*, which lives in an aquatic environment, the proximal convoluted tubule also reabsorbs essential substances. However, its emphasis on maximizing water reabsorption might be less pronounced compared to a camel, as water conservation is not as critical for its survival. 3 done, 2 left today. You're making progress.