Mention two advantages of uricotelism in birds.

Explanation

**Step-by-Step Solution:**

1. **Understanding Uricotelism**: Uricotelism refers to the excretion of nitrogenous waste in the form of uric acid. Birds are classified as uricotelic organisms because they eliminate their nitrogenous waste primarily as uric acid.

2. **Advantage 1 - Low Water Requirement**: One of the main advantages of uricotelism in birds is that uric acid is very poorly soluble in water. This means that birds can excrete their nitrogenous waste with minimal water loss. Only about 10 ml of water is required to expel uric acid. This adaptation is particularly beneficial for birds, especially those living in arid environments, as it allows them to conserve water and maintain hydration.

3. **Advantage 2 - Low Toxicity**: Another significant advantage of uricotelism is that uric acid is less toxic compared to other nitrogenous wastes, such as urea or ammonia. This low toxicity means that uric acid can be stored in the body for a longer period without causing harm to the organism. As a result, birds can safely excrete uric acid without immediate adverse effects, allowing them to thrive in various environments.

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