How have the terrestrial organisms adapted themselves for conservation of water?

Explanation

### Step-by-Step Solution:

1. **Understanding the Need for Water Conservation**:
- Terrestrial organisms live in environments where water is less abundant compared to aquatic organisms. Therefore, they need to adapt to conserve water effectively.

2. **Production of Less Toxic Nitrogenous Wastes**:
- To conserve water, terrestrial organisms produce less toxic forms of nitrogenous waste. Instead of excreting ammonia, which is highly toxic and requires a large amount of water to be eliminated, they produce urea or uric acid.

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