Desert mammals are adapted to water shortage by having nephrons with longer .............................

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question is about how desert mammals adapt to water scarcity. We need to identify a specific part of the nephron that is longer in these mammals.

2. **Identifying the Nephron Structure**: The nephron is the functional unit of the kidney and consists of several parts, including the glomerulus, Bowman's capsule, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.

3. **Role of Nephrons in Water Balance**: Nephrons play a crucial role in regulating water balance in the body. They filter blood and reabsorb water and essential nutrients while excreting waste products.

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