Instead of excreting, these can store urea in the tissues

Options

A. Birds
B. Fish
C. Elephants
D. Camels.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which organism can store urea in their tissues instead of excreting it. We need to analyze the options provided: birds, fish, elephants, and camels.

2. **Analyzing the Options**:
- **Birds**: Birds typically excrete nitrogenous waste in the form of uric acid, not urea, and they do not store urea in their tissues.
- **Fish**: Fish excrete ammonia directly into the water, and they do not store urea in their tissues.
- **Elephants**: Elephants, being mammals, excrete urea through urine and do not have the ability to store it in their tissues.
- **Camels**: Camels are adapted to live in arid environments (xeric conditions) where water is scarce. They have developed mechanisms to conserve water, including excreting highly concentrated urine and storing urea in their tissues.

3. **Conclusion**: Based on the analysis, the correct answer is **camels**. They can store urea in their tissues as an adaptation to survive in desert conditions.

4. **Final Answer**: The organism that can store urea in the tissues instead of excreting it is **camels**.

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