According to Bergmann's rule ,the mammals from cold climate have

Options

A. larger body short extremities.
B. larger body and extremities
C. Shorter body and extremities
D. Shorter body and larger extremities

Answer

**Step-by-Step Solution:**

1. **Understanding Bergmann's Rule**: Bergmann's rule states that within a species, individuals in colder climates tend to be larger in body size compared to those in warmer climates. This is because larger bodies have a smaller surface area-to-volume ratio, which helps in conserving heat.

2. **Analyzing the Options**:
- **Option 1**: Larger body and short extremities.
- This aligns with Bergmann's rule as larger bodies and shorter extremities help in heat conservation.
- **Option 2**: Large body and long extremities.
- This contradicts Bergmann's rule since long extremities would increase heat loss.
- **Option 3**: Shorter body and extremities.
- This also contradicts the rule as it suggests smaller body size, which is not typical for mammals in cold climates.
- **Option 4**: Shorter body and larger extremities.
- This option is incorrect as it suggests features that would lead to increased heat loss.

3. **Conclusion**: The only option that correctly describes mammals from cold climates according to Bergmann's rule is **Option 1: Larger body and short extremities**.

**Final Answer**: According to Bergmann's rule, mammals from cold climates have a larger body and short extremities.

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