Select the incorrect statement.

Options

A. Mammals from colder climates generally have shorter ears and limbs to minimise heat loss.
B. Many desert plants have a thick cuticle on their leaf surface and have their stomata arraged in deep pits (sunken) to minimise water loss through transpiration
C. During altitude sickness, the body compensates low oxygen availability by increasing red blood cell production, increasing the binding affinity of haemoglobin and by increasing breathing rate
D. Desert lizards manage to keep their body temperature fairly constant by behaviouraly means.

Answer

To solve the question, we need to analyze each statement provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Statement 1**: "Mammals from the colder climate generally have shorter ears and limbs to minimize heat loss."
- **Analysis**: This statement is true. According to Allen's rule, mammals in colder climates tend to have shorter appendages (ears and limbs) to reduce heat loss.

2. **Statement 2**: "Desert plants have a thick cuticle on their leaf surface and have their stomata arranged in deep pits to minimize the water loss through transpiration."
- **Analysis**: This statement is also true. Desert plants, known as xerophytes, have adaptations like a thick cuticle and stomata located in deep pits to reduce water loss through transpiration.

3. **Statement 3**: "During altitude sickness, the body compensates low oxygen availability by increasing the red blood cell production, increasing the binding affinity of hemoglobin, and by increasing the breathing rate."
- **Analysis**: This statement is incorrect. While it is true that the body increases red blood cell production and breathing rate in response to low oxygen availability, the binding affinity of hemoglobin actually decreases due to the increased levels of 2,3-BPG (2,3-bisphosphoglycerate) in red blood cells, which facilitates oxygen release to tissues.

4. **Statement 4**: "Desert lizards manage to keep their body temperature fairly constant by behavioral means."
- **Analysis**: This statement is true. Desert lizards exhibit behavioral adaptations, such as basking in the sun to absorb heat or seeking shade to cool down, to regulate their body temperature.

### Conclusion:
The incorrect statement is **Statement 3**.