An adjustment of camels to desert conditions is

Options

A. Maintenance of blood stream moisture
B. Minimisation of body heating
C. Tolerance of cell dehydration upto `40%`
D. All the above.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the adaptations of camels to desert conditions. We need to identify which adjustment is specifically related to their survival in such an environment.

2. **Identifying Adaptations**: Camels have several adaptations that help them survive in the harsh desert climate. Some of the key adaptations include:
- **Reduced Sweating**: Camels sweat very little, which helps them conserve water. They only sweat when temperatures are extremely high.
- **Body Insulation**: Their thick fur protects them from the sun's rays and helps to insulate their body, reducing heat absorption.
- **Wide Feet**: Camels have wide, padded feet that prevent them from sinking into the sand, allowing them to walk easily across the desert terrain.
- **Water Storage**: Camels can store water in their bodies, allowing them to go for long periods without drinking.

3. **Evaluating the Options**: The question provides four options. We need to evaluate which of these correctly describes an adjustment of camels to desert conditions:
- **Option A**: Maintenance of blood stream moisture - This is correct as camels maintain moisture by sweating less.
- **Option B**: Minimization of body heating - This is also correct as camels minimize body heating through their adaptations.
- **Option C**: Tolerance of cell dehydration up to 40% - This is correct as camels can tolerate significant dehydration without severe consequences.
- **Option D**: All of the above - Since all previous options are correct, this option must also be correct.

4. **Conclusion**: Based on the evaluations, the correct answer to the question is **Option D: All of the above**. This indicates that all the mentioned adaptations are indeed adjustments of camels to desert conditions.