Which of the following evidences does not favour the lamarckian concept of inheritance of acquired characters?

Options

A. Lack of pigment in cave- dwelling animals
B. Melanization in peppered moth
C. Absence of limbs in snakes
D. Presence of webbed toes in aquatic birds

Answer

To solve the question, "Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters?", we will analyze each option in relation to Lamarckism.

### Step-by-Step Solution:

1. **Understand Lamarckism**:
- Lamarckism is a theory of evolution that suggests that organisms can pass on characteristics acquired during their lifetime to their offspring. This means that physical changes that occur due to environmental influences can be inherited.

2. **Analyze Option A**:
- **Lack of pigmentation in cave-dwelling animals**: This is due to the absence of sunlight. The lack of pigmentation is a physical change that occurs in response to the environment, which can be inherited by the next generation. This supports Lamarck's theory.

3. **Analyze Option B**:
- **Melanization in the peppered moth**: This phenomenon, known as industrial melanism, involves the change in color of the moth due to environmental factors (pollution). However, this change is not inherited; rather, it is a result of natural selection favoring darker moths in polluted areas. This does not support Lamarckism.

4. **Analyze Option C**:
- **Absence of limbs in snakes**: The absence of limbs in snakes is a result of genetic mutations. This change can be inherited by the next generation, thus supporting Lamarck's idea of inheritance of acquired characteristics.

5. **Analyze Option D**:
- **Presence of webbed toes in aquatic birds**: This adaptation helps in swimming and is a trait that can be inherited. It aligns with the Lamarckian concept as it is a physical change that is beneficial and passed on to offspring.

6. **Conclusion**:
- Among the options, **Option B (Melanization in the peppered moth)** does not support the Lamarckian concept of inheritance of acquired characters because the changes observed are not inherited but are a result of natural selection.

### Final Answer:
**Option B: Melanization in the peppered moth**

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